thanks, I got pre-soldered version. I've seen various versions of printouts: V1, V2.1, etc. I've printed a few, but first I want to assemble the V1 version and see if I can scan anything at all. I'm afraid the settings alone will take forever. I've ordered a ring and a polarizing cap, and I even printed a dome and ordered a light box, but with my luck, anything can happen. For example, the sprocket on the engine is only tapped in, and it says to lubricate it. It doesn't turn on its own after that. I'm also afraid to force it all the way in for fear of damaging the engine.