i too use the pf tek. I started my batch on the 10th, and just put the first three cakes in my shotgun fruiting chamber. I still have 21 half pint jars that are still colonizing. The strains i am growing are PES Hawaiian and pink buffalo. My advice would be to wait to you see pinning signs invitro (still in the jars). Some strains take longer to fully colonize than others as stated previously, but be patient. Rushing and trying to fruit too early can ruin your cakes. Also look into dunking and rolling, helps to maximize yeild for later flushes. Best of luck on your endeavors. Keep us posted.