[m5burndt]

About the function: The stack of frisbees has a slot cut in the side, when we are ready to fire, an device of some kind pushes/pulls the frisbee into contact with the shooter.

About the 80/20: I agree, its heavy stuff. The thing is we need the adjust-ability because features such as the gearbox and several other points are fixed to 80/20 to allow us precise tuning over the pressure of the wheel-disc-guide dynamic

That said, we are looking at using a lighter material to supply the structure for those members, but attaching very short segments of 80/20 where we need the adjust-ability.