I've made this adapter on request for a friend. He has a Thrustmaster 300RS steering wheel and since he plays on xbox and playstation, he's unable to use a full thread on adapter, he needs an original wheel attached to the base. With this adapter place, you can unscrew the original wheel from it's plate, screw the adapter and use a wheel of your choice proving it has the typical momo/ sparco style 70mm PCD bolt pattern.
It also has a big hole on the left for the 8-way controller pad type button these wheels have. Most wheels will cover this unless you cut them, but it needs to be there even if you don't use it.

Also, the 3 bolts for the plate onto the base are chanfered to use the original bolts, and the 6 holes for the new steering wheel are threaded.
I've printed it in ASA and he's been using the adapter for a long time, he changes wheel all the time as uses a heavy wheel for drifting and so far so good.
The included profile is the the 0.2 strenght settings but if you want total strenght go for more infield, even 100%, and possibly apply threaded inserts. Still the one I printed with printed threads has been fine even with constant threding and unthreading, it sould be OK if you don't over torque the bolts.
Apart from 3mf files, there's two STL files, one with bigger round version and one with a lighter version with cuts as in the pics.