Small Spool Extension Coupler

I really like tamel55's Small Spool, but I needed to load a full pound of nylon onto a spool, and the small spool was too small. I used Slic3R and 3D Builder to slice off the male and female parts of the spool halves in the original thing stl files, and fused them to make a male/female spool extension.

You just print it and thread the coupler extension in between the halves, and viola', the spool is now twice as big!