On Mon, 23 Jul 2007 18:41:04 GMT, "Karl Townsend"
wrote:

I must go out a minimum of 1/hour 24
hours a day to check the unit. Problem 1 is turbine stalling. I'm running it
as slow as it will go to put down more water - below its rated range. A
system that works well would let me sleep at night.

Have you considered switching to pod irrigation?
http://www.k-linena.com/new_page_2.htm

Wayne