Oh, Adillo, what I would do to have a Robot Coupe! We used them at school and at the catering company (the one I apprenticed at, not my own). They are wonderful AND expensive. At the caterers we would have tons of bread ends so if I had time at the end of the week I would use it to make the best bread crumbs!
I had been looking at restaurant auctions for one for awhile and may still go that route someday.
As for french fry disks, mine (not a Kitchenaid) has one and it actually produces short curly fries, not long straight ones. I don't know how the Kitchenaid would fair on that.
As I said on another thread, I have a robot coupe r2 [albeit used] that I bought for $50 at a used restaurant supply store.
I have noticed when I used my smaller 7, 11, 14 qt cuisinarts, I always seemed to run out of space for what I was making in quanity. I love the power and the capacity and the food chute on the robot coupe.