Hi
got the nylon bolts from Peters, unfortunately they are too big a diameter my are self tappers as well. However I have checked with a multi meter between wheels and motor terminals with wiring removed and just get an open reading of 1. Which from what I can gleam is correct. So next stage is to solder in a chip and see what happens, I do intend to use a basic standard chip first rather than the Hornby tss one and then if it blows it’s not too bad. Hopefully the weather warm up a bit and then I can get in the garage to cut the lead weight.
regards
stewart