[Treeve]

Yeah I'm not sure what you've been told is actually correct, or if your certifier believes that it is then I'm not sure he's arguing his case strongly enough.

You should also ask if he's a certifier or a qualified engineer, because if he's not also an engineer then you could be paying someone else to do a lot of the calculations, as he technically isn't legally allowed to do them, even if he owns the textbooks and can drive a calculator.

Treeve