i3 spool holder

to be cnc'd out of 1/4" aluminum and drilled through. put on top of frame in a good position then drill through the spool holder, the top of the frame, and out the other side of the spool holder.

to be used with http://www.thingiverse.com/thing:22895 for ultimachine spools.

add threaded or smooth rod to bigger hole for spindle.
608zzs go in the spool holder plastic and slides on spindle.
use an endstop to keep it spool on spindle