Also impressed at the DSI repair policy.
Shot an email through, but to expand:
My issue is a couple keys needing 30-50% more pressure than the other keys. The range of the 'velocity' or whatever still seems there. you just need to apply more pressure.. but due to that, during playing sometimes the 'normal' touch might be too light, and those keys will not register..
wondering if that sounds like a key/spring issue, or something else? maybe something circuit or button based under the key (again I have no clue), just wondering what the fix may be?