An update on this in case anyone is interested. The Fortrezz MIMO2+ doesn't work. It won't join the network. Why? I think it's because the Fortrezz MIMO2+ is multichannel and the UDI Z-Wave 500 board doesn't support multichannel. Anyone have a good Z-Wave 500 "I/O Linc" "type" product I can use for this application? I realize I could use a Mimo-Lite like Asbril but that's a Z-Wave 300 product and I've made the decision that any new Z-Wave product purchases must be Z-Wave 500 minimum.