Interesting question...
I too put up my gear for an extended period of time. Did the flying thing for about a year. Wife found that I was needed around the house with 2 kids under age 5. Spent more money on formula than fuel. Most can relate to the time line. Anyway, this past fall, I got right back into it after 10 years of waiting. Have most of my old gear but... the interesting thing is that I also had a 90% gallon of glow fuel. Hummmm any good after sitting on the shelf for a decade????

You Bet.

In the past 3 weeks or so, I have burned all that fuel in a 4 stroker that was on the shelf just sealed in a bag. No true cleanup beforehand either. The fuel fired like it was new. I too would say you should replace the battery packs but as for everything else... letterip!!!

Yes. it's just as good the second time around..