37 was my smile moment too. Nice one.
In 30, back of base could actually have been clued just as base, and sometimes is.
FWIW I am a B user, and appreciate a place I can come for hints, ask for them, and sometimes offer them, and where I will not stumble across a blatantly written answer or too obvious pointer to a theme I’m still working out. I appreciate the new clarity and feel at home here.