The problem I'm having is finding an a hopper size to fit the old penny.
The ideal size 1d coin hopper from other 1d Bryan's machines I have is OD 35mm and ID 34mm.
The only metal tube sizes I have so far come across is OD 35mm and ID 32mm, as the old penny size is 31mm, I think that tube will be too narrow, and the penny coin will just bounce out of the hopper.
The larger size tubes I've so far come across i.e. OD 40mm will look too wide.
Has anyone done a coin tube conversion, and what diameter of tube did they use?