Also hey Phil, since we started lapping heatsinks (removing the yellow anodize and smoothing any striations or lack of flatness in the surface), we've been able to run 525/1060 on every unit that's gone out with Noctua fans. Still annoyed at 2-point mounting but the heatsink surface is the biggest problem with heat transfer on the unit you received.
"Ice Tower with Noctua NF-A4x20 5V PWM
I was very bullish about the test with the Ice Tower and the Noctua fan, this combination has already produced excellent results on the Bitaxe Ultra and Bitaxe Supra."
https://plebbase.com/research/naked-lama-um-gamma-i-mean-bitaxe-gamma-61cyan did a ton of research it looks good.