I'm experimenting with some Loctite PL Premium. One of my carpenter friends swears by it, says he uses it on everything, it sticks to everything, and is always stronger than what it sticks to. Says it works better than any of the premium glues.
I repaired an 034 air filter cover with it, built up an eroded part of the 034 tank handle, and as we speak I'm trying to fix a cracked 044 tank handle. It needs about 24 hours to dry. Have not run anything with it on yet.
The color comes very close to matching the Stihl tank handle.