Have a client that I picked up this spring. We went out in May and adjusted the system, replaced 2 Toro Super 700 heads with Rainbird 5004+ rotors. He paid and all seemed OK. Called a few weeks later and said there were some more adjustments to be made plus he put some seed in a natural area and wanted the rotrs adjusted to cover that as well. So I did what he wanted and sent a bill Called a 2-3 weeks ago and wanted 6 rotors moved about 18" due to seededing some more natural area along the property line. Technician went out, moved heads, replaced one that was broken and adjusted. Sent him a bill. Total for this call and the last (which I only charged him $40 for the 2nd call) totaled $150. Received a call last week from him saying how disgusted and unhappy he is with our work. The lawn is dead and the heads don't cover anything. Said he would send out payment but wants us to fix it or he will not use us again or refer us. Now, we are in a serious heat wave of 95+ degrees for many consecutive days, droungt still in effect along with water restrictions of 2 days a week watering with a max total of 3 hours to water the entire lawn. The clients has 8 rotor zones. Well to comply with restrictions his zones would have to run 30 minutes each. Normally rotor zones at 30 minutes would be OK but not twice a week with 95-98 freaking degrees. Plus the system is designed poorly with no head to head coverage and I believe the Toro Super 700 heads are one of the worst rotors out there. I have also talked to the previous company that worked on i, which is the comp. that I bought out this spring, and he had the same problem with the guy last year. I did not call him back because I just didn't want to deal with him and figured, Oh well. I'll never see the money. No big deal. But today I received the check. I thought about sending it back (or half) and tell him good luck finding someone else. Should I send him a letter explaining his problems or just cash the check ASAP and be done with him?