any tips on best way to fit main body section on the mnr? eg where to rivet, where to use sealant,where to use sticky back foam strips? cheers

Best tip I could give is have some help to do it - minimum of 3 preferably 4 people - you'll have it on and off like a hookers nightie marking and trimming it.

The body is a really good snug fit , you won't need many fixings.

On mine I put a rivet either side where the crease line in the body is underneath and one either side at the front once I finalised the front end. I also put 4 either side where I had to cut out for the rear suspension, but I assume yours will come with the cut outs already in so you'll need to assess how good the fit is.
On the top the scuttle and nose cone keeps things sorted.