http://imageshack.us/g/268/img0126mr.jpg/

I recently got a festool t12 and I am very happy. My only issue with it is that the jacobs chuck is kind of heavy for me since i mostly just use small drill bits, but I do appreciate it since I know I can use huge drill bits. I made this thing to try to stabilize drill bits while spinning and  to make it harder for it to pull out, and it does the job quickly and easily but has two major drawbacks, it requires two hands and the binder clip can hit your hand, at full rpm it hurts a little but is not dangerous.

To make, I used a binder clip with these dimensions: 3.2cm length, 2cm depth, and 1.4cm width. I used one sticky felt pad with 3mm thickness used for putting beneath furniture to not scratch floors, I then cut into multiple strips, using only three strips of about 3mm length and width. I stuck the strips at the very edge of the binder clip but I think putting it right where there are locking indentations on the drill hex bits would be better at the expense of requiring more work opening the binder clip to insert drill bits. You'll have to trial and error cut the thickness of one of the three felt pads, because one side has a bulge due to the binder clip design (the top part if you look at my pics showing the face of the drill) and also be a tiny bit closer to the center of the drill than the other two sides that are half-open. Fine adjustments in placement and thickness can make this a useful contraption, and with a binder clip of the dimensions I gave above you will be able to put felt anywhere in the upper half of the binder clip while the other half grips onto the drill. The binder clip can be clamped onto the drill either from the side or from the front, front insertion being easier. I think I will eventually wrap the metal handles for more comfortable use and less painful when I am accidentally hit by it.

Edit: Actually it can be switched with one hand, but it requires a lot of steps. First remove binder clip from the side, remove drill bit, insert new drill bit, put back binder clip. I prefer to put the bottom of the drill against my body, hold onto the top of the drill with one hand while pulling slightly on the binder clip, remove and insert new drill bit. Sigh can someone just make a fake centrotec for hex drill bits :p.

 

I was thinkin' it, but refraining from sayin' it.  I just kept asking myself, "WHY?"  I could understand clipping that on your nose.  I do that every now and then  , but on the drill as a replacement chuck.  Maybe it's time to consider just using a CXS with an occasional use of the bigger Jacobs style chuck from a T or C drill on the CXS (instead of the smaller one they give you).

Not sure this is the safest set up I have seen 

Why not use a Centrotec bit holder with hex shank bits?

Seth

Just a suggestion, but you might want to consider changing your bathroom reading material to the Festool 2011/2012 catalog.  Also keep a credit card and phone handy.  

P.S.  on Tuesday I tried a 6" Kreg bit right in the drill at my dealer.  It wobbled all over the place, just about unusable.  But I don't think your rig would work for that because of the angle at which you have to hold the thing.  Darn.

I just got the bit holder and it solves the problem of drill bit pulling out, but not the problem of wobble. It only holds bits up to the indentation on quick-change hex bits, not beyond the indentation. It has only one point where it locks onto the drill bit indentation, not three points like the centrotec, so there is one contributor to wobble.

I have a quick-change adapter for 3/8" drills that allows you to quick-change 1/4" hex drill bits, and it allows you to insert the hex shank past the indentation, so there is much less wobble. More insertion may seem bad for short driver bits, but if it is not magnetic the driver bits will fall right out when you open the mechanism. I was really hoping this bit holder would also allow that amount of insertion but guess not.

Since this bit holder is magnetic, short driver bits are very difficult to take out. You must pull back the sleeve and try to pull out the driver bit simultaneously. I have a drill accessory where the sleeve can have two positions, opened and locked, without having to apply constant tension to keep it open. Such a mechanism would've been better here even if it means no magnet to hold festool bits.

I will use this instead of my binder clip because I think if I wrap the hex shank indentation of all my drill bits with gaffer tape I can reduce wobble a lot, then simply remove the centrotec when I need to use driver bits. Thanks for the suggestion.