I had custom diy wheel addon for thrustmaster T300 base. As I changed T300 to MOZA BASE I had to make this adapter to make it work with MOZA QR.

The profile is set up for print in PLA, so 100% infill due to required strenght. It is highly recommended to print it with ASA/ABS or other strong material.

Dimensions of adapter:
96x96x13.2 mm

All holes are for M5 screws, I used M5x20 Imbus.

Put outer ring first and glue them into the adapter to prevent turning later.

Wheel addon side (outer ring):

Then get together adapter + MOZA QR

Those are for MOZA QR side (inner ring):