Thanks everyone and of course thanks for all the help from various forums and people over the years.
Bob was telling me he once had a guy drive a 7 all the way over from Swindon in the pouring rain.
I think the most important bit of advice from the inspector was read the IVA manual, have the build manual in the garage and read it regulalry, check everything against the manual as you go and then finally when you've finished check everything against the manual again.
Now time to start the mods