Filament Reel Adapter (v1)

Slide into the filament reel so that filaments from different suppliers all fit into a standard 15mm diameter bar/tube/rod (e.g. copper tubing). Currently I've got support for four kinds of filaments:

- makerbotfilament (the original makerbot filament)
reel-diameter: 52.5 mm
reel-depth: 55 mm + 0.5 mm
screw-diameter: 30 mm
rod-diameter: 15 mm + 1 mm

- villageplasticfilament (Similar to makerbot filament)
reel-diameter: 51 mm
reel-depth: 55 mm + 0.5 mm
screw-diameter: 30 mm