I put my last two bag blocks in a super low-tech "shotgun" fruiting chamber (a plastic tote with 5" of moist perlite and a lot of 1/4" holes drilled in it), and I got the best yield thus far. I'm not sure if it was the fact that these blocks were a full 3 months old, or if it was the change of scenery, but they averaged 1 pound each. They have really nice size and color too. I may have to make few more of these totes.