I would say that now is the time for you. Bend the stems and see if you have fan leaves still developing around buds. As long as they haven't hardened, I say go for it. Leafy Sativas with long flower times can especially go a little later with the final defol. Indoors with smaller plants, I would probably do it the "3-a-light" way, and just grow mostly un-trained, shorter-veg'd plants, and then schwazze once a few days before switching, and then a REALLY good one at day 21 of flower. That's when you see these indoor/tent guys growing these somewhat spindly, leafless plants with big ol' donkey wangs popping off the tips -- lookin' like the Grinch's dog when he put reindeer antlers on it, haha.
However, if I'm doing a lot of training in veg, or doing outdoor, I do it a little differently; throughout veg, my plants outdoors have been FIM'd, defol'd, pruned, supercropped, LST'd, spread and tied -- you name it. They're like blooming onions. There's really no need for a schwazze before stretch/flower, and it's hard to know exactly when that begins, especially with certain cultivars/phenos. I still schwazze twice, but I wait until after the stretch is mostly over, which is a very crucial time, and then I schwazze. Within 10-14 days, they already need it again, and it's the last opportunity. This puts you about a month in, max. It's not as absolute those first few weeks as "veg" or "flower." Hormonally, the plant is kind of doing both, and as long as the stems are still flexible and not woody, and new fan leaves are sprouting around buds, then the plant will recover and grow what it needs before going full-on sensi-time, and you now have a root ball and stem/branch system that was designed for a much larger, leafier plant, to stack flowers with.