Hi fred, I found nothing ether, I do plan on replacing the controller with a 32bit controller, possibly the SKR Pro, and later on down the line I plan to add multi filament, I was kind of expecting that I might need to replace the frame, and have most of the electronics there already (obviously buying the controller at the same time), and also replacing the extruder with a bowden type, one of the worries I have with that is if the nema 17 motors are big enough for other printer styles. and yes I do like to mess with things I've just installed a ram upgrade directly to my Amiga 500 mainboard instead of using the expansion port and thank you for your response.