allow me to welcome myself to the site and thank you, in advance, for sharing your advice and experience. with that said... I'm getting ready to hire an irrigation contractor to install my sprinkling system here in central Indiana where the soil is predominantly clay. i've gotten several quotes and each is very different from the others in almost every way. through the quoting process, i've become a bit more knowledgable...which is probably dangerous. as for the designs being offered, some have pop-up sprays and gear drives in the parking strip shooting over the sidewalk at the lawn. others say that's a no-no. some want to use a mix of the RB 1804 SAM-PRS sprays and RB 5000 rotors. Then there's the guy who introduces me to MP Rotator and says a few of these should be used along with rotors. As I investigate the MP Rotators, I ask "why not use the MP Rotators for the entire job" ??? Wouldn't they be more efficient and cost effective??? What about maintenance issues for MP R's such as grassy clogged nozzles, etc ? Why would I not be pleased using them exclusively with say...RB 1804 SAM bodies? What about pressure regulators? Wouldn't I achieve even pressure distribution to all heads in a zone? Would anyone recommend using pressure control valves? Perhaps my only area of concern (until I hear from you PRO'S) is the 7' wide parking strip (between sidewalk and curb) may not be suitable for MP R's since the best I can hope for is about 6' of coverage using the MP strips. And lastly....I'm being told that using gear drives (rotors) in the parking strip along with pop-up's will help eliminate any "striping" or brown-out of the grass coming in contact with the HOT concrete sidewalk. He admits this only effects about 6" of turf. The contractor says rotors sprayed over the walk will help cool the walk and prevent the browning of turf he has experienced when using pop-ups (only) to water the parking strip. HELP!!! By the way, here in Indiana, spraying over the walk is an accepted and legal practice...but not always followed.