what order to fit grp body bits?

[baz-r]

well i got all my bits now and have trimmed a few bits and bobs to alow panels to be placed on the chassis.
to get best fit what is the best order to go about it?
like does the sides go under the scuttle or do i trim out the area where the scuttle fits to top rail? same where the nose goes etc.
then there is the side to tub interface?
im was thinking of order

1. rear tub
2. sides
3. nose
4. scuttle
5. bonnet

last thing i want is a mistake