DIY Mini Crossbow Office Supply Ballista

I explained the most difficult parts. The rest I feel is fairly simple. The way my brain works, I can look at something and pretty much build it in my mind. Sorry for everyone that needs step by step tutorials. It doesn't occur to me that I'm not explaining it well enough or that it needs to be broken down into a simple form. I know everyone can do this, it may just take some time effort but once you have the materials in front of you it will all make sense. Check description for links to other "Office Supply Weapons" ! Ballistic Knife Pen! http://www.youtube.com/watch?v=tVp_46hRuiw FMG MAUL! http://www.youtube.com/watch?v=wzFfb4cGseo