Thanks for the reply @andyfrost, would you know if it’s possible to swap the wheels out for later wheels?
If not, I think I’ll have to take a look at the cambelt approach. Thanks.
Thanks for the feedback on the engine. I’ve been focusing on getting the engine running, purely because that’s the main thing preventing the whole thing from running and something I can get stuck into, but I’m not familiar with these things and I’ve got no idea what to expect once it’s sorted.