1. I spent half my work day attempting to install a single cotter pin, without success. The pin, which secures the clevis pin that attaches the RCP throttle to the FCP throttle, is deep inside the throttle quadrant. I may have to disassemble the entire quadrant and somehow re-design it so I can remove the side plate. I never anticipated this job would be so tough to do. 2. The second half of the day was spent attempting install the flap switch. The wire spacing and bundling, which I thought would be a problem, were no issue whatsoever. But for some reason, the single #8 screw that attaches the angled flap panel on the left side (from underneath) is being really difficult. What's ironic is that this entire assembly was test-fit long ago, and it fit perfectly back then. Not sure what happened in the intervening years...