A simple but important part for the clock was the spaces that connect the two clock frames together. These were a simple machining job, brass rod was faced off and drilled with a 2.3mm drill. It was then parted off in 15mm lengths.
The parts were rechucked and the parting off pip was then faced off. Finally the parts tapped with a 3mm through tap. The same technique of tapping in the 4 jaw chuck as used for the bush was used for the spacers. A pipe cleaner was used to clean out the threads before testing with the brass screws.
When assembling I found one of the threads was a bit tight so I ran the tap through it a couple more times. I discovered that a large tap wrench is a good holder for small round part.