ArChery Bracket for Compound Bow for 25DN pipe

Update: Instead of 3D printed riser and brackets I decided to use PVC pipe, like you can see on one of the pictures here:
http://www.thingiverse.com/thing:1755567

Description:
Modified brackets to accommodate DN25 PVC pressure pipe. Outside diameter of the pipe before flattening: 33.5mm.
Other parts from here:
http://www.thingiverse.com/thing:456919
Cams:
http://www.thingiverse.com/thing:1755567
Arrows:
http://www.thingiverse.com/thing:1755574