A little basic logic:

TS55 with some kind of stand: needs to be as big as a sheet of plywood, plus room to move around it and room for dust control (which could be under the sheet)

Table saw: Needs the size of the plywood on infeed side, plus another on the outfeed side (got to have somewhere to go), plus another width (4') in case you need to cut accross the width, plus outfeed that width (again).

You need a space the size of four sheets of plywood (128 square feet) to safely cut sheets on a table saw.

And you don't have room for the 7" folding stand, but do have room for the unisaw?

but adding an extension to the unisaw will solve the problem???

Fidelf, you're fighting yourself. Take the easy way out, park the unisaw in the corner or sell it.

now I understand, since you're keeping the unisaw, how much  hassle would it be to remove the fence and place a cutting frame on top of the unisaw for cutting with the TS55?

Maybe some strips of plywood with slots to lock together, they could live in a tight bundle not taking up much space when not in use

My .02 rant:  I have discovered that in woodworking many tools will often be able to achieve the same result, cut, etc.  The question is -- when is the tool ideally suited to the job?  When are you fighting the design of the tool to do a job for which it is not ideally suited? 

A classic example is the discussion we seem to have again and again about the TS55 and the tablesaw.  We talk often about ripping thin strips and cutting down sheet goods.  The TS55 will rip thin strips but is it the ideal tool to do so?  You don't NEED a tablesaw, you can make the TS55 do the job.  But it is slower and more difficult to do precision repetitive ripping with the TS55 than with a tuned tablesaw.  Everyone gets to decide for himself how much room, money, etc. he has and how to distribute it.  For my part, I keep my old Rockwell Unisaw because there are some tasks it just does better than any other tool.  (If guide rail cutting was the perfect, 100% solution, why would Festool offer the CMS or Basis systems?).  Steve Jones may have found the best solution so far to a tablesaw-less shop in the plate he developed to use the TS55 as a tablesaw, but other than that or a similar concept, the tablesaw still has a significant place in the shop.

On the other hand, why anyone with access to a TS55 would ever again use a tablesaw to cut down sheet goods is beyond me.  The tablesaw (short of a large sliding table European combination machine) is just not the best tool for the job (and that by a long shot).  The TS55 is ideal for this task (and crosscutting and other tasks as well).

So, while I can see why you like the table, Fidelfs, I can't understand why that is preferable to a TS55 with an MFT or sawhorses with a cutting surface, or any of a number of other cutting systems which the creativity of this group has generated.

Leaving aside money and space issues (which are the end of the analysis for many of us, much of the time), why not use the best tool for each job?

(off soapbox)

Dave, that was a good soapbox you were on, I listened to your speach, and I agree with you.  

I have two shops; one has a tablesaw and bandsaw and the other doesn't.  As well, I do a lot of off-site work.  Of course, I take my Festool stuff everywhere.  There is nothing much that I can't do when I am a without the tablesaw/bandsaw, thanks to my Festool circular saw and jigsaw, but I do use the tablesaw and bandsaw a LOT when they are available. (But, of course, I never cut large sheets of stuff on my tablesaw anymore.  )

All these soapboxes, tou guys must have really clean feet!!!

Well, Looks like I tried to make my post clear, but the message has not being received.       (Just a joke!!!)

The point I am trying to make it is the space issue, I cannot leaving it aside, that is my issue.  My message is I have to move all my garage to cut a sheet of plywood to use my portable table, CT22 and TS55. So this is very inconvenient, and I hate it.  It takes so much time to put everything in place.
My table saw is in casters but I don't move it unless I need to use all the 55" extension.  If I use this attachment It won't be in my Table saw all the time.  It is really easy to install. (see the video http://lumberjocks.com/jocks/David/blog/2770)  I have enough room behind the Table saw and I can use the gorilla grip to move the sheet close to the Table saw and then tilt it into this apparatus and then slide it very easily. 

People buy the TS55 and CT22 because it is not safe to cut a sheet of plywood in a Table saw.  This apparatus makes it safer (nothing is 100% safe even the TS55).

I think we're all trying to solve the wrong problem for Fidelfs....

He's got an expensive tablesaw, he put a lot of money into it, planning on getting years of use out of it.

Just because we would do things a certain way does not mean everyone has to. Every post here has valid points, none of them are solving Fidelfs problem. we are (well, I was, and you guys are) going in the wrong direction. Think about it.

I'm with you fidelfs.

At one point I had a couple of these http://www.rockler.com/product.cfm?page=5327 that I attached to the top of my router table for infeed support.  I rolled the table in front of the TS and locked it down with those on top.  Not perfect, but pretty good.  The rollers and a couple other minor things got lost in a move a few years ago and I never replaced them.  I'm probably going to replace them with these http://www.rockler.com/product.cfm?page=5328 and make some wooden runners.  I'll probably still use my router table as the base though since it is a good size at 30"x4'.  I just built a 4' square outfeed table also.
I bought the ATF saw not long after the move and have been using it since.  Even though I've gotten to the point where I have jigs and it works great, it's still pretty slow when doing repetitive operations.  Plus, I still wind up balancing my way through the TS occasionally (ie torsion box).
I understand fidelfs space issues as well.  My TS isn't going anywhere soon.  It requires infeed and outfeed no matter if I ever put a piece of plywood through it.  I also need a 4x8 area for my cutting table.  I have an area I use, but it sure makes the shop tight when it's deployed.  I think it'll be worth $40 to have the option of either method.

pardon me, I stopped reading this thread entries ago. I will add only that  I sold my Unisaw and now use the TS55 or TS75 ALL the time.