Revision history: 1.0 First version 1.1 Updated the back section for better printer result. Widened the wheel area so wheel didn't collide with top section 1.2 After printing, widened the (ABS material shrinked a bit so parts didn't fit anymore): 6mm holes to 6,1mm 5mm holes to 5,1 and 5,2 (middle section) 4mm hole to 4,1mm If you make one, please share your result!The goal is to create a kite messenger from these things based on this example: http://www.kiteplans.org/planos/ferry2/ferry2.html To combine with 24mm x 7mm nylon ball bearing wheels. 2x 4mm carbon 2x M5x25 bolt + nut 1x 4mm brass 4cm tube (5mm externally) 1x 6mm aluminium pipe Will be printed in ABS on a Dimension Elite. .