Looking good Derek, I presume you got your pipecleaners out of your tank? Interestingly, I coated the inside of a plastic funnel with POR15 and it's now peeling off in big strips so I'm guessing it's not great for sealing plastic of any sort, I hope it works better on fibreglass?
13.5 volts with a Dyna ignition and coils is actually pretty good, so I wouldn't be fussed looking for any more, it's about as good as you can hope for. The "battery tender" is a good thing, I've got one on my BMW with it's mega-expensive gel battery and one on my Suzuki GS1000, Ive got too many bikes and not enough time to ride them, anyway, be very careful using a battery tender for long periods of time, a traditional wet cell battery will continue to "gas" 24/7, and the excess gas will flow out of your overflow tube (make sure you have one fitted at all times unless you want holes to appear in your pipe, frame etc) and eventually you'll run your battery out of fluid, like I did on the Suzy.
It was no biggie, a nice group of men on holidays here from Iraq were nice enough to give me a push start, and the battery has responded well to being "re-acided", but it was still a little embarrassing at the time, just the same. Your browning of the left header is a tad concerning though, indicating a lean condition, I'd check that carb mate, doesn't sound right, and I'd hate for you to sieze that cylinder, take my word for it, being spat down the road and spending several hours laying on your belly having gravel scrubbed out of your raw arse isn't the best way to start off your riding season! Cheers, Terry.