I agree
They should have made it shallower, put the AF on the front and used 2 clips as opposed to 8-10 screws.
Got a response from one supplier
He said best way is to adjust by ear, then put something with 2500w surge on it, if it stalls, up idle a bit more. Nice bloke though.
Gentrax told me if you put a load on it and the generator stalls, you need a new inverter. That will be $350 thanks. I said I have fixed it by putting the idle up and just want the specs. They responded that the place that sold me the thing should be able to tall me the idle speed. So pretty good service - NOT.
And yes, I used their model numbers and said I had one of their models