Awesome, PETG seems like the way to go. I stopped using this ceramic spacer when I started using the 1.5“ bar vs 1“ bar. I still sandwich the bar with 1” Nylon+ Stainless fender washers which seem to help dissipate the heat more in my testing. The ceramic was expensive and took way more extra time with the build. I‘m trying to get my build process down to under 15 minutes while keeping cost as low as possible btw, I get next to no heat transfer that makes its way to the housing. I‘m assuming that is due to the 1.5” bigger bar and nylon sandwich.