Hmm, that might be helpful, as I do intend to turn some small parts for n gauge model railways (although for very small parts I usually pop them in a collet in my proxxon tool and clamp that to the bed of my cnc mini mill). I'd be grateful if you have any more information. However, I'm not yet sure if the conect lathe uses the Speed 10 headstock as stock (see posts above). If I post some pictures perhaps a kind person could help me to identify the bearings used and hence the max rpm.