Don't mean to be a tease but .....
Remember J. Gordon Holt's "goose bump" test?
Think setup is right after mat change.
No A/B yet with stock mat.
Not in a hurry to go back at this point.
I do promise to do that and give a full report on what I hear in the not too distant future.
*** caveat: early impressions are not completely reliable.
Advise not to "take this to the bank" - yet.