Sorry I can't suggest a shop, but I can offer two bits of advice. Ive done it myself on 1100 and 1100evo pipes. I don't know about the 1200 but on the 1100 the butterfly was too large to pass out the pipe without first cutting a section of it off. On the 1100evo it came out without needing to be trimmed. So suggest to whoever does it to first evaluate if it will pass through the pipe or will need trimming. If it needs trimming, do that before removing the butterfly screws. BTW, those screws are spot welded.
Second suggestion is that you specify stainless steel for the plugs. Otherwise they will become eyesores. Brazing or silver soldering is sufficient unless you just want to pay for TIG.
Great info. THANKS!
