I want to build a 1500 x 1500 Ox. I have sorted all the mechanicals out, including sourcing the Ox plates, but before I go and pull the pin, I have some questions: Is this a stupid idea? I have the room and would like the large build area so that isn't an issue. How is my y-axis going to fare with 2x 2060s over 1500mm? Using stock Openbuilds parts, is it possible to use a Nema23 stepper for the Z-axis? Is it even a good idea? My CAM experience to date has been with 3D printers, but my engineering and electronic and computer experience is of the 40+ years variety... which is why I am completely flummOxed over the electronics - so many choices, so many combinations. I live in the third world and electronic and engineering parts don't exist here - everything I need I have to import. Also, I am on a limited budget. I have a 24V 400W DC supply sitting spare. Is that going to be enough to power my creation, Or should I be looking at something 36V+? I know that a Gecko540 is the kit to have, but I don't have $700 spare, so that's out. I do have a couple of old Dell desktops and a nice Shuttle micro computer that I can use - but I also have about a hundred Arduino, a couple of Raspberry Pi and a couple of ARM M3 micros I can put to use. I suspect the Arduino just doesn't cut it at 8-bit and 16MHz, but the R'Pi and ARM are both 700MHz and the ARM has a decent amount of RAM - could they be used as dedicated motion controllers? And this is where I get bogged down. I can buy a package of steppers with drivers for under $100. But how do I tell them what to do? I've seen the TinyG, but it is a bit limited on power (2A) or am I kidding myself about how much power I will need? Primarily I will be cutting MDF and ply. Maybe I will look at carbon sheet and light alloy later on, but for now, it is just timber-based. Any advice gratefully received.