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Wouldn't waste your time with CHE, Mace are the dudes you want to talk to. Steve's a genius!!
I know that you have had your clashes with Dale Kuzman and I agree that if you are looking at tunes etc for the LLT/LFX or alloytec then MACE are the guys to talk to. Would have to say though that CHE did a very professional job on my extractor fit and I wouldn't hesitate to recommend them for this type of work.