I have the U.D.D. for my CTMidi and am totally happy with it. It came with the gray elbow. At full suction from the vac, it collapses only a tiny bit. ALL of the dust is captured and HEPA bag stays empty. It is clearly made for larger Ct vacs and has to be slightly modified to fit mini or midi, but you should be satisfied with its performance.  Guys on the jobsite ask what it is and I tell them that it makes cappuccinos and smoothies!!!!   
Good luck

Does the work center attachment for the CT still work with the Dust Deputy attached?

Awesome, this thing sounds incredible. Almost too good to be true. $229 is cheap for these results IMO? I ordered it after the first response, can't wait.  Not many places selling it, not on amazon, not on eBay. 

Great idea Peter! If I had of seen this before  I would never have gotten the ultimate.  The center of gravity is so low, I'd have no worries of tipping it over. Pulling it along by the hose is probably not a good idea any way.  Do you think the top of the deputy could withstand pulling it along with a planex? I'm thinking it's not a good idea.   But,  you can still utilize the top of the vac for a systainer.  Very clever!

I have the regular Dust Deputy ($35 - I think) and then made a drop box out of 3/4" MDF. The box has a light frame screwed to the bottom which clips onto the top of my CTL26. The top of the drop box is then at the same height (90 cms) as my other benches and MFT3. I used lock mitre joints on the MDF and the whole thing took just a couple of hours to make. After taking the picture I put some side handles and some clips to secure the lid on the drop box.

Peter

Hi Mike

When I made my drop box I knew that I might need to work out a solution that included the use of bags. The first time that I emptied the drop box I had a bit of a dust cloud and nearly implemented 'Plan B' but I waited. When I emptied the drop box the second time I opened out a plastic bag and allowed some air to go into it. I then put the top of the bag around the open end of the drop box and turned things upside down. The air in the bag stopped any suction effect and the dust quietly settled into the bag with no dust spill whatsoever.

So I have not implemented Plan B at all. I can describe Plan B if required.

Peter

yes, the UDD has a plastic tube line that goes from the special joint used at the start of the festool vac to the side of the UDD box.  There is alittle valve at the UDD box where the tube connects to shut it off if you don't want to use a bag (i.e. cut off the equalization/suction).  The bag hasn't gotten sucked up the cyclone for me (note: I've only had mine for a few months).

One problem I did have was with the gray 50mm tube that came with the UDD:  it did get pulled down when connected from the vac to the top of the cyclone (was using the 2nd L joint to go from the input to the festool tube).  I found that the black end of the tube started to crack.  Called Oneida, and they shipped me a new one.  Although the 50mm tube can fit directly on the top of the cyclone, it might be better to add an adapter or get another l joint to reinforce the plastic on this tube.  I think the green festool 50mm are much stronger and probably wouldn't crack like the Oneida on did. 

I also added extra metallic tape on all joint connectors in the hopes of reducing any static buildup.  Seems to be ok.

I have been re-using one bag for over a year, I just gently remove it, place it into a regular garbage bag and empty it. With that said I would assume you could use a normal garbage bag instead.

I have to say, the UDD (with a CT36) really sucks... 

RMW

One issue that I keep having:  the top cover for the cyclone came off the cyclone today for the THIRD time. I've used silicon for the last two fixes, but will try some other adhesive next time. Frustrating, but perhaps easily taken care of.

Hey Jay, would you be able to find out the measurements on the bags you are using?  Should be on the front of the box.  I tried the Glad ForceFlex (white) and they were too small.

I found the regular garbage bags I use fit just fine.  They are 26" wide by 33" long.  I guess these would be OK for sawdust, but probably not strong enough for any heavy duty stuff.

My first impression was this thing looks sweet.  People who come into my shop say, cool what is that thing.  If I had of replaced every fill up with a festool bag I'd be getting those more expensive bags more often.  It rides ontop my ct36 so I easily move it around, and I'm not hesitant to use it to suck ip anything, not just sawdust.  I love how nothing goes into my prized $700 vac also saving my hepa too.  The hose being higher off the ground also makes using my Paulk ultimate workbench more enjoyable with less hangups by the hose.  Changing bags is so much easier on the ultimate and much faster.  It's made out of the thickest most durable material I've ever seen, very high quality. My garbage bags I used are same as stated above.  I really like how much higher the festool hose comes out of the cyclone, almost making a ceiling hook not needed.  But if you do have a ceiling hook it gives you even more hose to utilize cause it's much higher off the ground.  This thing is surely the ultimate,  could not possibly want anything more from it.  So happy Rons ultimate workbench deserves it's name as well, it's revolutionized how I do things and praise him on the design, the crosscut jig is a joy to use!

==> Shoot me down in flames, but I have to say these things look UGLY

ugly... maybe, but maybe more utilitarian... yes.  some of us have cyclone central DC in our shops, and it is a bit 'cool' to have a  portable cyclone.  So the 'cool' factor is probably coming into play.  You are correct on the 'ultimate', but unfortunately business schools turn-out too many marketing types...

Roger I have the ac36. You may have known this, but just clarify, the ac36 can use the same hepa filter the ct36 uses.  It can do everything the ct36 does, with the extra option of a declogging mode you can set to decloge the special drywall filter more or less frequently.  When you sand drywall you are supposed to switch to a non hepa filter to keep it from clogging and losing suction, it has fewer pleats and larger micron.  But with the cyclone I just have left the hepa filter and regular dust bag in and haven't noticed any loss of suction, but I've done minimal drywall sanding since getting the onieda.  The ac36 in drywall mode actually uses an almost regular trash bag, not a fully enclosed dust bag like the ct36 uses.  When the unclogging feature engages it cuts off suction for a fraction of a second, allowing the cake on the filter to fall into the bag.  But with the onieda i dont think I'll need to use the drywall bag and drywall filter again.  If I notice a drop in suction after heavy drywall sanding I'll make sure to comment.

I think what the rep meant to say and should have been clear, you are not supposed to use the hepa filter when sanding drywall, nor the dust bags you normally use in your typical ct.  The ac36 didn't come with the hepa filter, just the drywall filter, so I had to buy the hepa filter separate.  But the Ac36 takes the same hepa as the ct36.  The ac with the Autoclean on makes a loud popping noise when the autoclean engages.  This loud pop cuts the suction off for a micro second and that is what pops the cake off the .1 filter. The hose jumps like it has had a sesure.  When I started my vac for the first time, I thought the thing was broke,  but that was just the autoclean coming on, so I dialed it all the way down to off.    There is a dial you can turn to turn the auto clean complete off, almost infinite intervals to set depending on how much auto cleaning you want if you're doing heavy sanding.  So with the onieda on top, I use the same .05 or whatever the normal hepa filter is, with the regular dust bag you are using in your ct.  No loss of suction at all after sanding a bunch of spots I fixed some plaster on in my apartment I'm renovating. Then I went directly back to using it for my routering and with my ts55.  The cyclone caught everything, and the suction is still the same I believe.  I too wonder what will happen if I sanded drywall all day, I bet the Oneida would catch it all.  I have to retest that theory soon.  but you could probably use the drywall filter in your regular ct36 and manualy pop the cake off if "if you had to" while sanding drywall with your cyclone.  The only difference in the filter is the micron is larger, so when drywall dust does make it all the way to the filter, you won't see as much suction loss as fast as with the hepa.
  Don't be embarrassed for being confused.  I too was confused until I got my hands on the vac and poked around for a few minutes.  It seems simple now that I've used it, but the bag system you use during drywall use is very counterintuitive. There is no top to the bag! It's just a trash bag really, but that is so the cake can fall into it. The Oneida seems to completely illiminate this caking of the filter, so no need to change your vac into a drywall vac.  This cyclone certainly is incredible.  You have to use it to find out unfortunately.  So I think people can get away with not getting the AC vac if you use an Oneida, I'd just throw in the drywall filter if you notice suction loss.  Maybe over the course of many days of sanding drywall the dust will clog the filter, if so I'll be happy I got the Ac, but right now I'm to believe a normal ct will do just as good if used with the Oneida. Hope that all made sense