That is kinda cool. Is the platen just rotating out of the way so you can use the small wheel then you raise the platen back up and skip the small wheel when you replace the belt?
I'd pass on that set up, it looks to me like some kind of accident waiting to happen.
Yes- this is what I was originally refering to and trying to articulate- both platen and small wheel are mounted pn opposite sides and the arm is rotated as needed.I've also seen people mount the small wheel attachment on the opposite side from the flat platen, then simply pull out the tooling arm and rotate 180 degrees. Voila
But depending on your grinder and clearances, etc.. it may or may not work.
The only small wheel I use is 3/4"
Finally got the small wheel attachment and small wheel set. Did end up mounting it on the same arm opposite of the tool rest. Then can juse flip when needed. Works great!