2 Important Lessons:
1. HPA is the only method currently available that is capable of producing a root structure that looks like fluffy cotton candy. Imagine how much surface area that provides to an atomized misting of nutrients. This root structure will not develop until/unless the root pod environment is conducive. Too wet prevents the fine root hairs from developing, too dry and the roots die. I have been guilty of trying to get these root hairs too soon by minimizing my wet cycle too soon.
2. When growing from seed (and probably clone) there is a tendency to reduce wet cycles too soon. The lack of adequate root structure will/can stunt plant growth. I have been increasing it due to plant wilt. Currently up to 8 seconds wet ~ 3:15 dry in a 18G pod, but will back it down one second at a time as the roots grow to tennis/softball size mass.