An Update
The year is up, and I just did another horrible exercise ECG. Nothing untoward was found; in fact, the RBBB this time was incomplete. The cardiologist has no explanation whatsoever for this as it should be impossible for it to reverse!!! However, once the CAA have see the results and all the paperwork is done, I should have my unrestricted Class 1 back again. I have no instructing work, but it's nice to know that if there is any I'm legal to do it again!