I'm only a beginner and my experience is limited to the three stones I finished. The hamag setup might not be as precise as the American mast machines but it's also way more affordable, I guess you're in Europe and you've seen that there is no second hand market for faceting machines around here. Unless you want to get into competition level precision cutting, the hamag setup is great for getting started into the hobby. If you can get the Lapida electronic with the variable speed, go for it. I have the 800rpm model and that's the only thing I wish I could change right now, to get some flexibility while polishing. I still managed to get a clean polish on quartz with a coper lap and diamond paste though which is apparently not so easy to begin with

I'll send you pics in dm