Upgrade an CTC formaker - Need help

[curious aardvark]

get an mks gen or base board.
comes with marlin firmware, easy to use and all your existing hardware should just plug into it.

The mks base have the stepper motor drivers built into the board - the mks gen uses seperate stepper motor modules.
Apparently it can make a difference - ask autowiz :-)

Also has the advantage that you can add a tft touchscreen. They are great and pretty cheap :-)
The touchscreens add interruptible prints for power cuts, usb port for printing from usb memory sticks and the ability to add a wifi module for wireless networking.

***
(looks up the formaker)
ah - does milling, cnc and laser as well as 3d printing. First time I've heard of it, which is a bit weird.

Can you post a picture of the existing motherboard ?
sounds like it's not going to be all that standard after all.
And already got a touchscreen.
One of these days I'll look stuff up before I post :-)
(don't hold your breath)