I bumped up my incubator setting to 74 yesterday. Up another notch then?
So these oysters, which fruiting started at 63(ish) would be better fruiting at warmer? (say, like in Florida, from whence they originated?)
Try incubating and fruiting at ~75 degrees. It tends to produce better quality mushrooms while lowering contam risk.
Wouldn't hurt. It's not likely that it will stay right at 74 or 75 anyway so a degree or two one way or the other isn't a concern.
If you keep the room (or incubator, or bin) at ~78 or 80 (up to ~85) it works fine too, at first. Once the mycelium has grown enough to start to generate it's own heat then you're actually incubating at 85-90 degrees, maybe even higher.
Something I often forget to mention is that when I first inoculate a BRF jar (or agar) with spores I incubate it at 80 degrees for the first 3-4 days to kick-start it. Then I drop it to ~75 for the rest of the grow.
I successfully incubated and fruited at too-high temps for years (with plenty of problems) before trying it at lower temps and finding that the quality of the harvest improved dramatically. Too-hot environments lead to hollow, lighter individual mushrooms and make the substrate much more prone to contamination (and dehydration), so IMO any slight speed advantage is more than offset by the disadvantages.