Please see the controller for the FC660C here.
Replacement PCBs for the FC660m, FC750r, FC980m and FC210TP.
Each of these PCBs have been tested by me, but I cannot guarantee that they work for you.
Use the latest nightly version of KiCAD to open these files. Gerbers and BOM are included for every PCB.
All of these PCB designs support PCB mounted stabilizers, but only with a custom made plate, as the stock plate tabs prevent you from putting the plate and PCB together with PCB mounted stabilizers installed.