Alunar M508 Spool Holder Extensions

This extension piece is used to widen the Alunar M508 stock spool holder so that various spool inserts can be used.

The orange spool holder seen in the picture was made by Foreverwinter, and can be found here: https://www.thingiverse.com/thing:1241566

The black one seen on top was made by butchja and can be found here: https://www.thingiverse.com/thing:2070272