10' cheap 2x6 cut in half for the sides
8' 2x4 glued joined to make a 4x4 base bar
random piece of wood for the top
bunch of screw
small posts for the top piece of wood.
Base side detail
The sides can slide in and out to adjust the width.
The top is held on with posts so it is also adjustable.
adjust the width so so the crossbow sting just sticks out both sides. That will make the correct width.
I originally wanted a slot to slide the prod into but my first placement was way to high so I had to lower it and just left it as a hole. It works, I will make it more of slot at some point in the future. Mk 1 was a little two short amoung other issues so I of course over compensated with the next design but total height actully works but the prod slots needed to be re-located.
Screw jack with mounting jig.
I used a bottle jack from my truck. I had make an adapter that that fit over the jack end and the crossbow end to keep it togather. The adapter in the picture is after it broke when I dropped it. It worked great when used but couldn't take being dropped. If it wasn't a borrowed jack I would have bolted it down. Saftey issue: Don't stand in line with the crossbow and jack when under load. I had the jack kick out once before the I made the adapter and that was a bit scary.
So upgrades: Use oak or hard wood for the sides. The cheap 2x6 barely works.
Gettign a purpose use jack and bolt it in place.
Add a base of the sides so it is less wobbly.
Otherwise this worked and cost me less than $10 to make. That was becuase I had the glue and the screws and some spare wood.
Last edited by Basilisk120 on Tue Jun 07, 2011 3:43 pm; edited 2 times in total