I have purchased 3 sets of 890s and I need them to overlap (ie: I need multiple remotes to control a single RF receiver, and one remote to control multiple RF reivers. The web site would not allow me to set up in that way. I got an error message telling me to rename my RF receivers because they are named the same, even though I named them defferently during setup.
There is no help desk phone number that I could find, so I had to fire off an email to their help desk. Return time is listed as 24Hrs so I will update you tomorrow