I predict plenty stretch if flipping them at that size, but you said your gonna veg a bit more? Mine is only through the first week of flower almost, and I've been getting a good half inch per day now. I'll let you know how long that carries on for. For some reason my stretch periods don't last very long though. Usually 2-3 weeks with most strains. I always hear and see others' plants stretching for at least 3 weeks and getting an inch per day. I think it could have something to do with my LEDs though, or maybe because I veg to a good size/maturity. Yours are looking great tho, and should be ready for that good bud production either way!