Leveling adapter for prusa style heatbed

As I was building a small prusa style printer, I wanted the leveling screws a bit out of the way.
This is the result.
Fits for a alu heatbed 3mm thick.
Goes over the corners and has a thight fit. Accepts a M3 nut.
See pictures.

I printed these in Polycarbonate with a 0.6mm nozzle as I want to print ABS too with this one.
If you just need to heat up to 80°C, ABS will do too (red ones in the picture).