Just tossing an idea out here so I don't forget about it.... One thing I have always thought about with slingshots is that the ammo ought be close at hand and easy to quickly grab one. There's no closer or more convenient place than the body of the slingshot itself, if a storage/dispenser system is properly designed. So my next project will likely be inspired by a combo of the top pic, and the metal device in the bottom pic. It will have an entirely metal square (or rectangular) tube body and handle, and almost the entirety of it will store lead ball ammo. I'll create a spring-door ammo loading point (sorta modeled after the Winchester carbine loading point) that is separate from the dispenser, so that ammo can be very quickly loaded. The pivoting fork is great; I have one on my dual-pivot laser aimed slingshot, and the accuracy is excellent with zero fork hits as it is self-aligning. So I will incorporate that. It will also have a removeable folding wire brace (removeable to keep it legal here in NY). Once that's all done I'll have to add some exterior material, both for grip and to quiet the ammo rattling around inside.