[matto]

If Boise's SD Locals come from the 72.5-deg satellite, which I think they do, then you need to keep that dish. The new AT9 5-LNB "sees" the 99, 101, 103, 110 and 119 satellites, but not 72.5-deg.

Just connect the cable from your 72.5-deg Locals dish to the "Flexport" input on the Zinwell WB68 multiswich.

This would be a great time to find out from D* whether the Slimeline is designed to accomodate an optional additional LNB assembly that integrates into it.