KLD sounds like your doing some clean installs. Brother. Working here in LA we see about 1/2 & 1/2, either it's some one-man trunker, or some quasi-telecom install (alarm/electrician/computer-tech, replete with crimp on connectors and a lil' buttie pro). Or you get to see an artist’s work, someone with all the materials, never sparing cost and time for quality and perfection. Either it's perfect or a complete shambles, rarely see much in-between. Hey man those 624's isn’t nothing compared to a KX-TD(A). Everything is super-simple with the old 816's and 1232's, way easier on a computer then via DTMF. Allot more reliable, am seeing some failures but rarely, seen lots of fried Analog cards, toasted sets and the like. Got to keep 'em cool for sure. Sure those Kansas winters don't hurt.