well i had these painted up for my car almost a century ago now ,and then they were not the right backing plates so i fabricated a new mounting pod out of fibreglass and made steel plates with bolts welded and its all go..
ready to sculpt the top hat and then pain the pod
and lay indicator wiring to the mirror.
should look somewhat pretty when its on i reckon
just filled in time after cleaning workshop to start the Race car mods..
Shhhhh dont tell Brad..