All in my journal mate. Cause my rootball is very important, I up-pot to retain it, Due to this, i found the Halo's wouldn't give me an even spread onto my rootball but instead feed in a circle closer to the ring itself. Feed mostly once a day atm. Might go twice if they're thirsty but my feeders are very efficient at soaking substrate with 5 mini inlets from the main feed ring. I built a nifty little intake system with two connections to the feeder ring so i can rotate the plants without removing the feeders, steaks or taps. Its hard to explain but all the pics in my journal. The only thing is that I find it cheaper and easier to buy the feeders. Its takes me days, hell weeks even (especially if im stoned as ten chooks) to actually make the fucken things.
So if time is an issue then the shop feeders are a much better option especially when you have to do things like
measure twice - cut once, Cut all the 4mm stuff first before starting the 13mm and then onto the 19mm poly, make a couple prototypes plus all sorts of other stuff like spending half my life at the hardware store and more time in my tent flaps than my wife's flaps
Sharing the couch with the Poly and dog most of the time
Living space is a mess.