I brewed a batch this past weekend. Under shoot my mash temp by a degree and over shot my OG by a considerable amount (1.052). My post boil volume was a little low, about a quart maybe, but not enough to account for the OG overshoot. Maybe I need to adjust my efficiency numbers?? 
Anyway, I've never used rice hulls when I batch sparge. But if/when I brew this again, I'll definitely use a good scoop. I had the mash suck down tight to the false bottom and stopped the flow 3 times. And I had my flow throttled waaayyy down. It wasn't a huge deal. Broke of the mash up with my mash paddle, let it settle back down and continued. But would prefer to have a single continuous sparge....
Looking forward to the taste test in 2 or 3 weeks

Anyway, I've never used rice hulls when I batch sparge. But if/when I brew this again, I'll definitely use a good scoop. I had the mash suck down tight to the false bottom and stopped the flow 3 times. And I had my flow throttled waaayyy down. It wasn't a huge deal. Broke of the mash up with my mash paddle, let it settle back down and continued. But would prefer to have a single continuous sparge....
Looking forward to the taste test in 2 or 3 weeks
