That sounds fun, retro fitting the Meade focuser to stepper motors.
DC motors never cut the automation.
Treat yourself to a Moonlite or similar and save all the fuss you will have with DIY. I have a Moonlite focuser and the good thing about them is they have their own adapter for the back of the Meade which means the opening is larger than 2", you can fit your focal reducer inside the Moonlite as it has a thread specifically for that, they are very strong and can handle extra weight as well as having many options for draw tubes etc. Other good brands may be similar. And it all just bolts on ready to go.
I'm curious of the issues you are having with your current Meade mount. I ask as I have a 10" LX200GPS on a Milburn wedge too. Is it GPS related or something else? Or are you over it and definitely going down the EQ option.
Cheers,
Damien.