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I don't think so. Other than MTH's home base in Germany, the remaining MTH outlets are satellites that offer localized service for MTH's wares, but are not tuning shops themselves.
you can send in the A/F readings from dyno sessions to get the map improved. They no longer offer this for the base software (unless things have changed again).
Doc, there was some disagreement about your point over on MINI2. I had the same understanding as what you have stated, but some over there stated otherwise. For those considering MTH, it might be a good idea to clarify the policy with your MTH rep.