I'm still shopping for a laser. How do you set the focus on a Chinese laser cutter if you don't have an up/down motorized table? The laser I like wants $500 more for the up/down table and I think I can just block up the rotary fixture with a simple jig I could put in place of the knife bars. I just don't know how the focus is set. Does my plan have any merit? I would pony up the 500 bucks but I don't even know if I will ever engrave a cylinder. I need the laser to cut balsa and ply R/C airplane parts. I thought it might be nice to be able to engrave on a cylinder at some point but I have no projects in mind at this point.
Adrian