This took us forever! We just arrived at our rental property in the Finistère, and we solved this over several glasses of wine, cider, and beer, with our friends Carrie and Andrew, who, frankly, were little help, having just arrived from a full day of traveling.
So anyway, we finally finished it! My favorite clue might be 30A: They cast no votes (ANTIS). It had me fooled for quite some time, what with the emphasis on the wrong syllable and all.
32A: Key employer in England? (GAOLER) is tricky, but it doesn't seem quite perfect. And SHOPVAC (34A: Woodworker's device, informally) doesn't really need to have the "informally," I don't think, as the product is actually called a Shop-Vac. And that seems formal enough.
Franny was sorry to come up with TREPAN (9D: Bone-boring tool), since it's so gross. And GLOP (55D: Unappealing bowlful) might as well have been "slop," for all we knew. (of course, AVERAsING wouldn't have been a very good answer for "53A: Doing mean work?"...).
The 4x9 and 3x8 stacks are pretty strong, but we felt that MAGNETOS (37D: Alternators in some internal-combustion engines), 14D: They clean up well (SLEEPERS), and ABIE (54D: "____ Baby" (song from "Hair")) were a bit of a stretch. BUT, it's Saturday, so we can't complain.
1A: Result of a bad trip (FACEPLANT) gets an A. I love the fill, and I love that "flashback" also fits in the same space.
Sorry so cursory. Column will be back tomorrow for more insightful, colorful, and erudite reviews.
Signing off for another month,