I'm trying to get my head round the manual and I'm struggling TBH. 
There are 299 pages but not all things are applicable.
I can't find certain things but that doesn't mean they're not going to be an issue.
For example, it talks about fuel tanks but seems to say nothing about fuel lines or how they are to be attached...

If someone has been through one, can we have a bit of discussion on here to help demystify a few bits? 

Not me but parts supplier CBS car builder solutions sell IVA marked things. That might help.

Carl from the MBC put his buggy through the IVA I'm sure

carl put his old buggy through last year after prepping it failed first try then got a pass after a couple of tweeks however he does not get on here. Will contact him for you and see if I can pass on his number.

You will have a pm soon.

Thanks all!
Thanks Snoopy, I'll probably give Carl a call tonight.