The silicone split-bushing is really cool - where did you get that?Thank you thank you thank you.
What do you think of my holder?
Only 1.5" dia, any bigger wouldn't work with my rig.
Couldn't get your o-rings to fit. You can see the silicone I trimmed to fit.
The spec I have on the heat shields is 2.25 inner diameter for the clearance. The very first heat shield test had a cavity of 1 5/8" (the biggest blank size I had at the time) and that was insufficient for shedding enough heat. It got very hot to the touch. Granted, It was typically laid on its side, which surely had an additive affect. But IMO that clearance wasn't quite enough for thin wall cherry. Sitting upright may prove different, but do tread carefully changing spec on these tolerances. This isn't a configuration I'd advise for long term use. I babysat this core and did not leave it unattended.