What is causing the actual limitation of 70 devices? Is it the just the processing speed of the controller? Sounds like other people on here have had up to 95 on a single controller, but got better performance when switching controllers. When you look at computers there are 4 main resources, CPU, Memory, Network and Disk. Which one of these resources is the limiting problem? Or is it like an IP network where you are limited to 254 IP address in a class C network, (assuming subnet and router addresses). I know alot more about computers than I do control4 stuff.