You made your SIPs, so yours may stay more moist by design. Also plants use water at different rates at different stages of life. If you are happy with everything, dont chane your routine. If you think they are staying good, dont worry. Especially being first time running yours. Gey a baseline idea of how they work. Tweak later. You have to realize that when we mak our own, the wicking can be different than the store bought ones. I have ran Juniors enough to feel comfortable doing thing differently. The safest bet is to water to run off as you are. Plus my low rez tech is only for the firstvfew weeks. Then I increase as it needs. The soil depth and brands can also effect wicking. Also, remember that plants stay moist longer when you water to overflow. The more often you water to overflow, the longer it remains moist. You use more water doing 1/2 Rez...because the soil and plant uses it up faster. I prefer the 1/2 full rez due to my extensive knowlege and experience with cloning. Moisture level is the single most important factor in root growth speed. Seedlings dont need as much moisure as a 4 week old plant. Using 5+ gal of soil can keep itself too moist for optimal root growth. Less is more. And we want the roots to seek moisture.So during this time the lower section of soil should be a tad wetter than the top layer for optimal root growth. Roots seeking downward for mousture. Good luck, slow