I designed some new way cover extensions and am having them made from stainless steel
Attachment 423304
Attachment 423306
Attachment 423308
Attachment 423310

Then I rearranged the rear cabinet after removing the stepper drivers
Attachment 423312

I replaced the three proximity switches on the X axis that all quit working (because they are the only ones mounted upside down, need to seal them with silicone to keep coolant out)
Attachment 423314

Built a new Rex84 Ver2.0 to get the drive fault working for fear of the powerful servos breaking stuff if the spindle stalls
Attachment 423316

Made some mods to Mach3 with brains to get the servo drive faults to trigger an e-stop
Attachment 423318

Ultimately this was again a seamless upgrade as all of the Mikini front panel controls work exactly the same as before, as well as the Mach3 controls.