Changed out the fasteners on the motor mount to fuselage bolts for the all-metal lock nuts. I was wondering why the nylon AN4 locknuts were so scarce, and it also crossed my mind when I installed these the first time that everything firewall forward should be metal locking. Saw a photo on another builder's website, went back to the print to confirm the part number, and yes, I had the wrong nuts in there. Gets easier to work on those ones at the lower end of the motor mount (inside the small box there) by doing it over & over again.
