Agreed, fantastic little camera. I just picked up one a few months ago - it was my first rangefinder. After shooting SLRs for years, it was a pleasure to shoot. I'm using interslices battery adapter and have a light seal kit but haven't had an opportunity to use it yet - there always seems to be a roll in the camera.
I have used his kit on two other cameras. I was skeptical at first about how much better it could be than doing it yourself, but I'm a believer now.
I also have a 28 in good condition but don't really have a justification for holding on to it. I'll probably try selling it in the near future.