Heavy *INTERLOCKING* M3D Filament Spool Holder Bushing

I Didn't like/Couldn't Use ANY of the spool holder bushings that I found already designed for the M3D Spools successfully...
(They would keep walking out of the spool and then my spool would drop onto the spindle of my filament holder and everything would get all screwed up...)
Soooo... I decided to redesign one that would work. It was designed in ScorchCAD for Android which can be found in the Play Store...

These Bushings work well with:
THING 705345
(It seems like after browsing