For those of you who don't know, Vic writes for EAA magazine, is a DAR, A&P IA, IFR rated pilot, serial Vans RV builder and I don't know what else.

He is a frequent poster on Vans Air Force Forum and flies an RV that he built. 

While it's titled "Maintaining Your RV" many of the issues apply to all aircraft. It doesn't matter what plane, or what engine, you are flying this video will teach you things about your plane you didn't know. 

It's Vic's first seminar on aircraft maintenance in which he goes over dozens of recent installation issues he has found on aircraft. He explains what is wrong and how to do it right. This was done just recently. 

I have spent almost three years getting everything close to perfect on my 601 and yet I came away with a list of items I need to go double check now. 

Seriously, this video is really worth your time to watch whether you are still building or are already flying.

https://www.youtube.com/watch?v=SXG7gRrh7UY