Yes, thx PK....
This clears up a few areas for me:
-- the 4h/3s support question for Opener
-- the "error" in Root & Pavlicek
I won't repeat the R & P's "error" but I prefer your summary:
---Note that responder starts all game forcing auctions with NMF.
[ Example of this is BL's post # 2 ].
---The jumps are all invitational or weak.