This was a quick assembly and easy to complete
Holes need to be enlarged to 4mm.
The nut plate is then attached to all four corners then aligned for match drilling the rivet holes using a 2.5mm drill bit.
The nut plates are then removed so that the match drilled holes can be countersunk.
Make sure you counter sink the holes on the correct side of the part!
Installation is differed until after painting and during final assembly.
I also replaced the wire loom provided by Sling with a pre-assembled wire loom purchased through Midwest Panel builders.