I switch from Sanwa M11x to M12 Futaba 4PX and now on to Sanwa M12s.

4PX is a good radio controler, feels great at the not drive, looks like from the future with the TFT screen, and with the associated new receiver (R314 ...) and Updat for 4px also super fast (honestly not The big one)

We drove many to 4PX, did almost everything that had problems with the pot. Can be the Futaba at new Serri has improved it.

For me, M12S is better

She has it all, to make it ergonomic for you, nothing needs to be bought.

The mechanics feels better for me when driving
Also the ergonomi when driving i find also better.