Still working my way through getting the chassis running and I now have the inside motion running forwards at least.

As an aside I have reversed the front crankpin bushes to look more like the prototype and to give additional clearance for the motion. I was wondering about how to tighten the reversed bushes and remembered the late David Smith talking about making peg spanners as he called them. I chose a similar route but instead of pegs I used the same approach as the 4mm scale Romford screwdriver (I still have one in my modelling toolbox).

For those who haven’t a clue what I am talking about this is a Romford screwdriver

This is the leading crankpin bush that I am talking about

This is the custom big boy’s ‘Romford’ Screwdriver that I made to tighten them. The business end is 3/16 silver steel and the end was shaped with a 3mm end mill with the rod held in a square collet block so that I could keep flipping it over to take the same amount off each side.

If I wish to use this method of securing the coupling rods to the front wheels again in the future I will probably need to make another one with a smaller diameter to fit reversed Slaters bushes. The crankpins on this build are 8BA so bigger than most builders make them (the wheels were already tapped 8BA for the crankpins when I received them with the kit). Continuing my current ‘Dremel’ tool theme I used a ball burr in the mill to make the grip. Previously I have used the ball burr in a similar manner to an end mill by cutting into the top of the work piece. This time I did it differently and side milled it. This gave a much better finish and was easier to do. I milled the grooves before turning the taper.