Finally finished the CAD work on these. Hopefully the first prototypes will be printed this afternoon.

Early type Pre-1895
1895-1915 type
1915-1924 later type with flat ends
If anyone is interested you can see the 4mm versions in the flesh so to speak on the Pre-Grouping Rlys stand at EMGS Bracknell in just over a week and the 7mm versions at RailEx. Also they can be done as a complete kit in both S and G1