have you ever found out who makes it? I think I remember you saying that you had someone put it in for you - is there a chance you could give them a ring to see exactly what model it is? It looks kind of like the DaviesCraig 16", but there appear to be some differences around the motor. If that thing works that well I personally would love to know what brand it is since I have been testing both a Perma-cool 16" and Davies Craig 16" on my Z no with moderate succuess. Thanks man!