Arrived almost by "accident"

Hi there,

I just recently discovered your forum while searching informations for two crossbow builds I am trying to do. I have limited experience building a miniature prototype for the first build and am trying to start designing using Autodesk Inventor.

The main topic I am interested in crossbows are the repeating crossbows. Any specific section for that?  Image may be NSFW.
Clik here to view.