Welcome to ModelEngineMaker !If you have problems registering or logging in, please use the contact menu option to request assistance.
Thanks Jason. I have just realised that, by putting the spring washer between the head of the bolt and the wheel, I will need to put a short spacer between the wheel and the engine body to stop it rubbing, which would not be a problem with the washer on the inside. I'm sure either will work fine.