I fit the instrument panel to the forward ribs and clamped a straight edge to the panel to ensure it was flat, then match drilled the clip to the forward canopy decks.
Next, I fluted all of the substructure to ensure the holes were in line, then fit the top skin in preparation for match drilling it to the structure.
I clamped the firewall flange flush with the forward edge of the skin using the cleco clamps. I had to adjust the flutes several times to get the edge of the firewall flange to follow the line of the top skin perfectly.
Finally, I match drilled the subpanel, firewall and ribs to the skin.
