This is my 1st ever design which i made to solve the issue of the placement of the spool holders on the Geeetech A10M.
It turns the orientation through 90 degrees to relieve the strain on the filament sensor and lifts the spool by 20mm so narrow spools don't foul the extruder gear.
Use two M3 nuts and bolts to attach the spool holder to the adapter
then use to original t-nuts and bolts to attach the adapter to the top of the frame.
I printed mine on the Prusa mk3 using petg
This thing was made with Tinkercad.