Hub for Super8 / Electonic Component reels. Reels are varying widths so holder needs customising. Holder is in two parts which lock the reel in place. They fit over a bolt (eg a shoulder bolt), with a spring to lock the cap castellations into the rod. Design is optimised for building with minimum support.printed at 0.35mm on UP printer. Designed using OpenSCAD version 2015.01.23 (git 5a0c4b0) (customizer may not work until it uses a more recent version of openscad) Using a shoulder bolt for the axle is ideal. Probably should drill out the axle holes to clean them up, rather than make them too oversize.