The Pizza Cutter - Prototype

So, I had an idea for a heavier slingshot for firing 28g and 56g lead balls, and I thought I'd slap something together in the way of proof-of-concept from what I had in my workshop. This is what I came up with:<br><br><img src="http://img.photobucket.com/albums/v391/Zeppo/001.jpg" border="0" alt=""><br><br><img src="http://img.photobucket.com/albums/v391/Zeppo/003.jpg" border="0" alt=""><br><br>I wanted something that would fit to the arm in a relatively low profile way. It needed to be able to accommodate fairly heavy bands, for which I've decided to go with tubes. I know wide flat bands would be more efficient, but with the wheels I have, tubes work perfectly. <br><br>The band is kept in one long piece, which is looped through the back, and the loose ends attach to the pouch. The bands sit in the pulley wheel's channel. <br><br><br><br>If it looks like a piece of crap... well it kind of is. It works quite well, save for three things. <br><br>First of all, it needs a lanyard or strap of some kind at the back, near the loop for band attachment, to loop around the forearm. Just to keep it from twisting in the hand.<br><br>Second, the band I have for it is on the heavy side.It's a 25 lb latex tube for fitness. The pouch attachment incorporated the original components of the band for attaching handles to the end, and, lucky me, that's where it failed. I'm thinking I'll switch to a 15 or 20 lb tube to reduce the stress on the pouch attachment<br>Third, I want to add a way to keep the bands around the wheel so they don't have to be reseated after every shot, though, I am pleasantly surprised at how easy that is to do.<br><br><img src="http://img.photobucket.com/albums/v391/Zeppo/003.jpg" border="0" alt=""><br><br><br>I'm also thinking about inverting the handle, that's a very simple change. When I get the new bands, I'll test it both ways and make a call then.<br><br>Anyway, thought I'd fire up these preliminary images to see what you guys thought.