Buly,
 I have not heard any results of your EC2 swap with John's controller.  I'm waiting on a couple of parts to repair the blown CHT & EGT channels on your EM2.  I know you don't currently use those functions so if you want me to return all your stuff now and worry about EM2 repairs later I can do.  Your call.  Did not find anything wrong with EC2 in several days of testing it.  I have thought about Johns theory that there is some odd quirk about running updated square style EC2s  on my test bench that does not turn up the problem but if that is the case, I can't find it nor can I think of any scenario where this could be the case.

Tracy  (in catch-up mode)