[robotic321]

Id personally make it depend on the type of robot. What if (if your "feeding") you had a system that allows some tolerance of where its put into play? I.e. make an area designed for the tup to fall into, like a laundry chute? if your throwing, Make a wide area on top for the tube to fall into kinda like in lunacy. These are just my opinions. Whatever your doing, hope it works great.