I'll try to make this short. City water is $0.01/gal. I have a Rain-Bird system. 7 active zones, 2 programs. I put a well in that started out with 12 gpm, now is around 8 gpm. I changed most of the sprinkler heads to 8' (1 gpm). My problem is pressure. If I set my A program for zone 1, it's OK but when it transitions to 3, the heads do not pop up. Same if I have program B for zones 5,6,7. 5 comes on but when it transitions to 6, the head don't pop. If I advance program B from 5 to 6 to 7 then of...