Hi everyone, I'm looking into purchasing a lathe for clock construction at the moment, and as I would like to make weight driven clocks in the future, I'm considering to already buy a lathe which has a lead screw for thread cutting. My question to forum members is; Do you have any recommendations into types of lathes suitable for cutting grooves in regulator winding drums? Also, are there other simpler alternatives than a lead screw lathe, such as some type of home-made rig that can cut grooves, even manually operated? (I'm thinking of a simple rig that could be purpose built which already has an appropriate spindle/thread ratio for cutting grooves). If any members know if such a home-made rig exists already, and would be prepared to share the idea that would be greatly appreciated. If no such rig exists, and I would need to buy a lead screw lathe, I would welcome suggestions. I actually have the possibility to purchase a second-hand Schaublin 102-80 VM in very good condition for much less than what one costs outside of Switzerland, so this is actually a viable option for me, however, I would be interested to know what other members approach is to groove cutting operations. On the subject of the Schaublin 102-80 VM, a friend told me that it could potentially be good for other tasks in clock making such as for passing cuts on brass weight shells. He said that a lead screw lathe will give a much better surface finish, and using power feed is also better in general for the cross slide and cutter. These appear to be additional arguments that would support purchasing a lead screw lathe. I would be very interested to hear other members thoughts on groove cutting of winding drums, and lead screw lathes in general. All recommendations warmly welcomed! Best wishes, Paul.