About this 3D model

As the name states this is a business card sized device that folds out into a little desktop catapult. It can be used for launching various small objects. Video of the card here: http://www.youtube.com/watch?v=rv8u7rttdBM After making many of my original Cardapult design (posted on Instructables) I decided it needed to be revamped to make it both simpler and stronger. The axles were beefed up to 3/8" from 1/4" and the upper arm was lengthened and lightened for better performance. The legs were simplified to cut down on the number of parts.