[MrBasse]

That looks nice, very well integrated components. I wouldn't worry too much about the PG71, we used two of them to lift our robot up the pyramid last year over 60 times with a 1.5" pulley. If two PG71's can dead lift 142 lbs over 450 feet in one season, I'm pretty confident that it can pull back your shooter. Then again, how much tension are you pulling back?