Has anyone out there installed nore than one of these T2's with the IRF-6? We have had the what seems to be the only misfortune according to RTI of 3 bad IRF-6 units and 5 T2's. They have sent replacements which work but this kind of problem does not seem to appear on other threads. We were among the first to receive our units and our distributor maintains the first "batch" had problems. The last S/N we had difficulties with was 020-005146 does anyone have a unit close to this? Do you have any problems? We think this product is a great alternitive to more expensive options in the control world but the time we have had to spend troubleshooting these system has far outweighed the price these other system would have netted us.