OK..............I received my Moisture meter. I probed all over the ceiling thru the rat fur in and around the fantastic fan, escape
hatch and the AC.
Probed down the walls even. No unusual moisture readings found anywhere except the front carpet under my dining table only in the center near the front step up ledge. I'm going to leave that for another time. Seems to be a very small area.
I got my sprinkler out and aimed it at the Scamp
and let it run for 1/2 hour. Went inside to investigate and after removing the plastic trim piece from the fan. I could see the source of the leak. Along the front edge (nearest the AC) water was steadily dripping from the inside of the fan. It was not the carpet side(dry). I could only conclude this was coming from rivets that hold the fan down and found a path inside. Water would drip from the far back driver side corner because the trim piece would direct it that way(lowest point).
I did re-caulk most of those rivets a few years ago and it must have kept the water out then because we had no leaking until now. So.............re-caulk again? Scamp suggested removing fan and re-installing with new butyl tape Then re-caulk.
I choose a different plan. I did not remove the fan but installed over all the rivets a 4" wide Eternabond sealant tape. Very sticky stuff. I read good things about it and decided to give it a try. Hopefully it will last more than a few years. Gave it the sprinkler test and all is good.