No video, but I just leak tested my -8 tanks this morning, no bubbles!
I highly recommend using cartridges. I found it much easier and less mess. I used these (standard 2 hour cure as opposed to Vans 1/2 hour cure offering)
http://www.skygeek.com/flamemaster-c...lant-6-oz.html
You can use a length of vinyl tubing on the cartridge nozzle to get down into the nose areas or dab over rivet heads.
I also used the access panel sealant for the access plate and sender. I used 1/4" cork dots made from the cork gasket (Whitney hand punch) and put them on each nutplate rivet (with a dab of regular sealant, then let cure) to provide a controlled sealant thickness when I tightened the cover screws. Worked very well with no excessive squeeze out.
Overall, it took me a lot longer to build the tanks than I would have guessed, but hopefully I'm done now.