Step 1, After reading this I have decided to wait.
SECTION 41 UPPER FORWARD FUSELAGE INSTALLATION Page 41-3 and 41-4.
Step 1, I added two 7” X 4” access panels with riveted doublers in place. However I am in the process if adding a 7” wide X 3” height additional cut-out for the 12” necessary depth of the Garmin GNS-430