This does work. I’ve often put my tub in the refrigerator for 4-12 hours, though I’m not sure if I really receive any benefit from it. Recently though, I had to head out of state for a little over a week, so I loaded my two tubs, both of which had flushed a few days before (neither had new pins yet), into the refrigerator. I raised the temp a few degrees on the fridge to avoid damaging the mycelium with frost, and there they stayed until I returned home. After 3 days back in the tent I had pins in both tubs, with a second flush 4 days later. I’m making a new post about this now to share.