Kossel top mount 2020 version (for ATOM top)

Actually I don't use it since it might spin too smooth too much.
Need some resistance.

add 5mm to 11.5mm adapter for original design
Some Maxtor Hard Drive bearing dia is 5mm instead of the 11.5mm

Also use Kossel_Filament_Spool_Holder_2020 to mix a base plate for 5mm dia bearing on 2020

Filament_Spool_Holder_2020a.stl is just a cut for 2020_plate_base.scad. Don't need to print it.


Add universal_plate_upper
Add universal_plate_upper 2

Add support for 11.5mm di