So as a quick background I've made a 3-d printer (I know a monkey could assemble one of those DIY prusas) and want to step up my game a little bit. I came to the realization that some people have made/sold DIY milling kits, but most of them are for plastics or wood. I would like to make a small 1.5'x1.5'x10" mill that has the capability to cut softer metals like aluminum. I thought about just changing the tool and bit on one of these machines, but I'm not sure that'll work, let alone having to scale up their designs. I guess my real question here is, how difficult would it be to make a mill, as opposed to building a 3-d printer? I have no problem cutting out pieces to make an acrylic frame with a laser cutter just like a 3-d printer, but from seeing other's design's, aluminum frames seem to be used because a higher level of rigidity is needed. My main issue here is, what would I do for the electronics and rotary piece? Would it be possible to use a Dremel mount or something like that? It's probably easy to tell I'm really quite inexperienced in this, but I'm just asking to get my feet wet here. Any advice will be very much appreciated, thank you.