Does anyone have anything good or bad to say about a folding hopper thought about trying one and does anyone have any good picturs of one that I can get some ideas I would like to try making one this winter when im slower thanks

I would not recommend a folding hopper on a TB-105. 

The foldiing hoppers work well on the feeders where the rails, tail pulley, hopper and hopper rollers all move when the belt is tensioned.  These are what we call "active feeders," found on TB-80, TB-110, TB-130 and all TBS models.

When a TB-105 is tensioned, only the end frame, hopper bracket and tail pulley move.  You have to move the hopper u-rollers manually, but the hopper stays with the end frame and tail pulley.  To move a folding hopper, on a TB-105, you would have to relocate the hinge brackets. 

On a TB-105, An option would be to leave the brackets in place.  This would result in the tail pulley sticking way past the back of the hopper.  This would give the mixers a bigger target to back in to, or spill concrete on.

I think it also may hit the levers that control the feeders functions. My refurb unit came with one and we switched back to the standard hopper.