Removed the tape from back plate of FAB. Sanded down the edge to fit with the filter housing. Installed on fuel injector to fit with the air inlet duct. Marked the intersection and drilled thru both back plate and filter housing to #40 for nut plates later. Reinstalled on the injector to check fit with aluminum inlet duct on lower cowl. Lined up well finally. Bottom right pic is shot of filter housing inside the lower cowl. Bottom left pic is front shot of lower cowl air inlet