Mystery solved on the thread pitch. I received an email from Coolerworx this morning and he verified the M12 X 1.50 thread pitch. With that info I took an M12 X 1.50 die and cleaned up the first couple of threads and it's fine now. Apparently when the existing knob got tightened down it compressed the first couple of threads. I can see how that can easily happen with the design of the existing knob mounting design.
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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
700+whp
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