Printrbot Simple Handle Alu Spool Holder

This is a spool holder that latches onto the Printrbot "Simple Handle Alu" without any need for additional hardware. It simply hooks onto the Z rods and wraps around the handle for support. It incorporates a 30mm stopper to allow space for the Y arm to move along the full length of the Z axis without bumping into the spool (be warned however some spools will have an inner, recessed circle like the larger Makerbot spools). On the other end of the holder is a 5mm stopper to keep the spool from