first time in awhile having a situation like this. i have to do a simple sod install, a small front, about 600 sqft. i have to till the front lawn that is there, and add about 2 yards of soil. no sweat, can have it done, with sod, by lunch. the guys having a sprinkler system installed in the front yard, on 6/12. do i do my job, and let this guy rip up his channels, and risk having to replace it? or let him go first, and risk damging a head while prepping the area, and hope they come out the right height... being i am adding soil? the safest way, i know, would be to prep it, let him lay the system, then come back and sod.. but that sounds like alot of effort for a small job. any opinion?