Some of the features I was wrestling with were a mechanical safety, a bull-pup trigger configuration with at least a bit of mechanical advantage, and fabricating everything myself except the prod and string. Those will be for the next project!
The prod is 150# fiberglass, covered with nearly completetly in leather. It's held in the socket by wooden wedges. It draws a full 12" from rest to the lock nut. The wood is Ash, not what I would reccomend for a pistol grip since it's so splitty, but it was cheap! I mitigated the splitting factor by drilling a 1/2" hole all the way through the grip and gluing in an oak dowel. The finish is a combination of ebony stain, black enamel paint, and polyeurethane. I was going for a faux antique look, and like the almost "camo" pattern I came up with. The lock plates, prod plates and trigger/lock bits are blued steel, the grip guard and stirrup are painted aluminum. The nut is delrin and the nut socket is UHMW plastic. More on that to come.
Initial survey indicates Yes! It's a shooter. The projectiles are 16" overall, 3/8" carbon fiber tube with Richard Head points, plastic fletching, and small screws glued into the butts.
I still have a lot of work to do on it, though, and this is where I'll do it: The arbalist stand I just finished. The best part is the only thing I had to buy was the jack for $20, the lumber and metal tool stand I picked up for free.