Hi, Glad the flights went well.
I notice the "alligator skinning" is right where the ali tape is fitted inside. That stuff doesn't stop heat, it's a conductor. You might be better with a layer of 1mm thick ceramic paper.
I buy mine from Ebay this sort of thing
Ceramic Fibre Paper for Gaskets / Kiln Liners 610×300×1mm Sheet | eBay
I line the underside of my JayTee and JayLow models with it, stuck on with a thin layer of foaming polyurethane glue (Gorilla glue)