Geez Don, I had not realized you were a petroleum engineer, as well as all the other gigs you profess to be a expert at. You've got your head up your butt, as usual.
Nope.... not an engineer. Just a landscaper who has never professed to be an expert at anything. But over the 5 years that I worked behind the counter I saw more than a few heads of all makes and models that dumb$hits had hosed down with WD-40 in the hopes of making them work. But hey since you ARE a self professed expert in EVERYTHING irrigation related then who am I to question you.... keep hosing away buddy.... and I'll keep laughing at your old a$$.