Remixed from Fincky's design (https://www.thingiverse.com/thing:4744638)

1) Removed most of the exterior details to decrease print times drastically (saving up 2.5 hrs) and reduce chances of print failure.
2) Increased the internal size for adding more weight
3) Added x4 M4 nuts inserts for a much stronger attachment using the side brackets
4) Added x4 M5 nuts to close the lid securely

Prusa

I3 MK3S

No

Yes

200

15

I printed the body in 10hrs and the lid in 2.5hrs

To speed up printing, if using a 4mm nozzle, try printing at 3mm layer height. Makes a huge difference in print times optimization. You don't need high resolution for this.