Nice progress Steve. Piano wire might do for the poles since it's pretty thin but holds itself up. As for the flags it might take a visit to the Michaels or Joann's to see what might work. It will be tough scale-wise to keep the fabric pattern from showing through. Some kind of plastic may work. g'luck!
I too prefer 1/25 but as an older builder I may have to consider your question. It's not just eyesight but dexterity that comes into play. I had to fabricate a mic for a CB radio yesterday and it was quite the show if anyone had been watching. I agree with Bill and Mark about variety. Going to 1/16 would mean more resin kits and therefore more work. Interesting topic.
Wow Steve, that is some extensive work!! I love it. You've also kickstarted me to begin work on my Elvis build that I've already bought the kit and parts for. No where near as much work required as yours though. Thanks for sharing.
Sorry to hear about your paint problem. Been there myself. Good luck with the redo. I have that kit as well, not sure when I'll get around to it but I'll keep my eye on your build.