@Nosmoking,
do not worry, I'm working on problems. Once the new plugin debugged( thanks to MikeMaat), we will tackle your problem.
But i must admit that at the time, i do not have any kind of idea why M03,M04,M05 commands do not work on your side....In Config>Ports and pins>spindle setup, "Use spindle relays" checkbox and "Use spindle Motor output" must be unchecked...that's just a point to check...
@Mikemaat
I'm working on the frequency issue which is the one explaining others..
Will contact you before the end of this long week-end (remembrance day)
seb