Sorry to resurrect a 3 year old thread, but do you microwave the glass with the plugs in? I'm assuming they're silicone lab stoppers right? No weird melting or off gassing or anything?
How interesting, to read this after finding my IH build is heating improperly with a premature click.
Great way to keep that in check until I can re-wind the coil. Still looking out for a proper 16mm mandrel, as I've seen you suggest on here before.
Thanks @TommyDee