For the screw in the middle which holds the kickstand in place, you will need a M4 x 4 mm threaded insert. And for holding the battery lid in place, you require eight 5 mm x 1,5 mm magnets.
1x Threaded insert: M4 x 4 mm
8x Magnets: 5 mm x 1,5 mm
The author marked this model as their own original creation.