I hope Elk provides a forum and access for hobbyists. They seem to have a very good product with the M1 Standard and Gold. I sold off my ADI Ocelot (which has top notch customer service and an excellent forum) and modules to migrate to the Elk, let's see how it goes. Right now I am reading the install manual and trying to figure out where I want to place the keypad. I am also waiting for my PSC-05 and will order the ElkRP Software CD at the same time. Meanwhile I will wire everything up on a test bench.
Are you using the wireless expander and if so do you recomment the 4408E, 4416E or the 4448E? Wireless PIRs are very expensive in comparison to hardwired.