I have been fortunate enough to be using Holland brand diplexors for the past year or so and I would agree that their stuff is really trick! Used to do stacked LNB with the standard dual LNB but am REALLY glad to hear about the triple. There is one other solution but I think that they are all the same except maybe price. There is a place that I have gotten stuff from in the past called SEG (satellite engineering group). Their techs are pretty smart about getting around "impossible" problems.