NinjaFlex Sample Filament Spool

This is a simple spool I made for 50g of sample NinjaFlex I got from Printrbot. It prints in two halves that screw together. The inside diameter is 40mm and the outside edge is 94mm. It was designed to fit on the spool holders of my Printrbot Play and Simple. This holds 50g well and could probably go up to 100-150 without any problems. I wouldn't recommend using this with a non-flexible filament since it might make it curl too much.

The holes for the filament are a little tight so the ends c