Hey Andrew
You have 2 spare controllers??? Awesome
What PCB's are they? (MX-318/319?)
How did you get those!! Sneaky
Don't even think about changing it unless its broken... And if a controller does fail, never throw it out as you can near guarantee it's just a couple of FET's on the board.
From memory, 1 forum member modded the internal controller running it external before changing it to an infineon. All other attempts to modify the board have seemed to fail.
I'm leaving mine alone
![Wink ;)](https://goldenmotor.com/SMF/Smileys/default/wink.gif)
The other night I fixed a MX-318 PCB (the one with the shunt mounted on side1 of PCB) before it had 5 beeps, I replaced the FETS and now it doesn't beep even without throttle connected - but plugging in a throttle it works!! (not sure for how long though..)
You can definitely 100% purchase an internal controller from GM - I paid $60USD via EMS over a year ago now and was sent a pack of circlips, MX-318 PCB (current at the time), new power wire (battery anderson connector), full pack of spare quick disconnectors + new controller to DIN socket harness
Not sure if it's the same price now, or what you get - but I'm sure it's available.
So how did you come across these controllers Drewmeister ??
![Cheesy :D](https://goldenmotor.com/SMF/Smileys/default/cheesy.gif)