--snip--
Levels still full pressure tank , high as in up to filler cap in filling
reservoir
--snip--

This reminds me of a question I keep thinking of and forgetting to ask:
Where is full/normal on the expansion tank? I see a "min" mark just above
the mid-line seam, and I've always figured that the system was supposed to
be self-leveling to a point, but I have filled my expansion tank to the
bottom of the neck (with the overflow tank full to the bottom of its neck)
and the system always finds the same level, which is perhaps 1.5" above the
expansion tank seam. I have no leaks, no overheating issues or any of that,
so I'm just curious. My guess was that as it "self-bled" the air (how does
that air get out?)it made room for the coolant, but I dunno. Thoughts?

Cya,
Robert