2 kg Spool Adapter for the Ender 3

This simple blocks generates enough clearance that 2 kg filament spools will

work with your Ender 3. Simply use some longer M5 screws to mount the original

spoolholder. I used threaded rods and cut them down to something like 65 mm.

So getting M5x65mm screws sounds like a plan if you are not keen using a hacksaw ;-)