I like this one more and more as I review it. It pushed back at me during the whole solve, but it was a satisfying struggle. Loved the pair of "fall" clues - 12D: It opens during the fall (PARACHUTE) and 67A: Fall fallout, some believe (ORIGINALSIN). And many of the other 11s were good as well. KINGSRANSOM (17A: Fortune), JACKSQUAT (14D: Nada), BLOCKADES (13D: Some trade barriers) (very nice!), and the wonderful MAGINOTLINE (63A: W.W. II defense). And that's just a sampling. There were many more clever entries. 23A: Hudson River school? was nicely deceptive, especially for one who has taken art history, but are there really any SHADS still in that river? Didn't GE pollute it back into the stone age?
For a while I wanted "A pos." for 61A: Many a donor, in brief, but although I didn't remember exactly what it was, I knew that the "54D: Sporty Lotus model" was a woman's name, and "_pise" didn't look very good. And speaking of that quadrant, is OMEGA used in some kind of math as a 52A: Resistance figure? I suppose I could ask someone from the 3D: Quick set. HAH! Those morons.... Oh, and speaking of morons, I've never heard YOS used to mean "5D: His, modern-style?" Who says that? [But wait! It's not possessive, it's plural! Hi! = Yo! ... very nice!]
This is the fifth puzzle we've reviewed by Mr. Knapp, all of them Thursday or later. He's always challenging, but fair, and I think this is my favorite one of his yet. I look forward to the next!