in some places, the surrounding metal is just too thin to allow much of an oversize, even with just a heli-coil, the metal is so badly fatigued from the original damage to hold the new threads well
I often suspect that chinese aluminum is an alloy of half pot metal.
Thanks C. I wouldn't be surprised about the purity of the metal in these cases. Does anyone live near a good scrapyard with a hand spectrometer? It would be interesting to find out for sure. H
They still have pull tabs? Aluminum beer can cut up in strips. I have used only to shim the clamp for the push button kill switch that was too large for my handle bar tube. Mostly heavy steel metal. I guess that's why I have the bike weighing 130 lbs.