You guys have captured my thoughts exactly - no tie breaker yet! Does anybody know just how "removable" 4200 is?
It looks like the mast base I removed was sealed in with regular silicon (and not particularly good stuff), but in cleaning things out, I found what looked to be remnants of something more like 4200 or 5200. That stuff didn't want to come out.
The shape of the mast base is such that it doesn't contact the mast all the way around except at the base flange. Does anybody make an effort to fill up the areas that don't contact the mast on the inside, or just do enough to seal it at the rivets and bottom?
