Looking really good. Like the colour scheme its going to be very
bright
As for fastening, Iv'e used rivnuts all over and a mixture of m6 and m5 Dome allen head bolts and m6 bolts.
All are fastened out of sight apart from 2 that sit at the bottom of the curveed bit. They will never be seen though as I'm going to use a pair of sill protectors there.