I stopped using Rainbird product about 6 years ago because I switched to a different distributor that pushes Hunter. I used the R-50 rotary for about 8 years and still think they cover better than any other rotary. I stopped using them because one year I was getting about 5 heads/case that were bad. The distributors did not admit anything was wrong but other contractors were also having the same problem. Anyway, I couldnt keep up with service problems anymore and stopped using them. By the way, the same year I noticed them in Home Depot. Coincidence? or did they find a way to make their product cheaper? As for the DV100 valves, I havent used them in about 6 years but in the last few years been noticing quite a few with hairline cracks on the inlet side of the valve right on the flow arrow. Anyone else have this problem? I used them on all different manifold systems and there are problems on all of them. Since then, I tried Hunter valves(Problems=coil thread too fine, servicemen loosen them too much and crossthread them trying to get them back in. and the inside of the coil seperating from the outide,whats up with that.)then Irritrol valves, OK but not a fan of the bonnet. Get a little sand on the thread and forget it. Settled on the Weathermatic Silver Bullet. Superior construction material, manual operation and serviceabilty. Only problem, the year I decided to use them, they decided to have a coil problem. My luck. Anyone get killed by that problem?