Yeah this is pretty fun- I have about 5.5' so 3' is about as tall as I'll let them get. This one is mainlined and tied in knots. I can probably take the ties off now.
How's the density? I like to judge by loose dry jar weight. My sativas might only have 1oz per jar, and the densest indica can be 2oz jars. I do agree, you probably get better yields with bottle nutes. Have you tried dynagrow?
They are really drinking now. Watered yesterday and they will need it tomorrow. The plan is to grow these in smaller pots than last time, hopefully watering everyday