Tenkara Fly Fishing line spool

I'm a designer and a tenkara fly fishing angler, I was wondering to design my own spool to store the lines...
I tried the one designed here http://www.thingiverse.com/thing:232208 by @ecleticangler and I decided to design my own spool with some features.
This spool is one piece with two place where to fix the fly and 6 groove where to lock the end of the line.
I placed a snap-on joint on one side that help to store two lines holder together! And the hole in the middle lead you to put it on your rod directly!

Hope you are gonna enjoy as I did!!

Thank you!