Communication with DAG for me has been very prompt. Recently I had a lenses done and it was fast, as well as an MP hot shoe issue, both done about 2 weeks with prompt communication. Also YYE perform this MA finder service that is being asked here exactly in my M4. The RF patch started to separate, so the MA finder went in, also had the 75/135 lines masked out. It performs extremely well, just like a new MA/MP and now my M4 has 28mm lines. Very clear and sharp in viewing. It’s basically an MA now but with the vintage Leica build of the M4. The MA finder is quite nice since the frame lines are all continuous because there is no meter display.