of course the method will work, but don't you agree that is a little simpler and more stress free when you can just check to see if it is drying out or not, and then add more water accordingly? I agree with zandor that a drip system shouldn't be implemented on the rockwool itself because it is made precisely to hold the right amount of moisture to keep the seed and or roots alive. Next time try seeds in about 25% soaked rockwool under flourescent light and see if they dont poke out faster.