Hi,
Can't help on brake bias as I don't have an adjustable setup. I know what you mean about powder coat...
Regarding IVA - are you going to Shrewsbury? Reason I ask is that the tester there (10 years ago now) tested mine - first 5exi he had done.
Very thorough - particularly with panel radius inspections and security of cables / brake pipework. I also had to put a heat shield between the bottom of the fuel tank and the radiator pipes / hoses that pass below it.
Also - make sure the rear spoiler/wing is not fitted - instant fail!
Good luck, and let me know when you're on the road - you're only 40 mins from Crewe
Cheers
Rich