There is always the old trick of making a pure vermiculite reservoir in the middle of your cakes. Once the cake has colonized and started flushing, sterile water can be injected directly into the center of the cake. It is a lot easier than using drinking straws, and produces huge fruits. A good way to go about it is to take a 10-12cc syringe and cut the top off. Pull the plunger back and pack the syringe with moist vermiculite. Fill your jars as normal for the first 1/4" then set the syring in the middle and fill around it. Once the jar is nearly filled, slowly extract the syringe while depressing the plunger. This will leave a small cylinder of plain vermiculite in the center of the cake. Fill over the top of this with more substrate and seal as normal. The vermiculite in the center will not colonize. After the cake is fruiting, water can be supplemented directly to the heart of the mycelium. Back when I was growing on cakes, I got a fruit that stood 6-7" tall and thick. I couldn't fit the bastard in my little drying chamber. We sliced it up and ate it like a steak.------------------
"It never got weird enough for me."