Hi Dave,

You might want to post in the Featherweight section if your looking at building it, a lot more builders read that section of the forums then this one

AJ has drafted out a good parts list there. Although, I would make a suggestion on getting a Spektrum DX6 radio. Drill motors are a good, cheap source of drive motors, but if you over volt them, try to stay within 150% voltage (ie: 12v motors on 18v is 150%).

Pneumatics can be a pretty dangerous weapon, so your best off starting at low pressure (145psi) and spend a few months talking with those who run pneumatic featherweights. Their advice and experience will help you time and time again