No need to replace any LNB as the OP already is getting the four needed satellites so all that is needed is to connect the DPH 42.View attachment 129709 You can put the power inserter after the hub also, but it has to be on the host line - the line to the Hopper plus you'll need (i'm sure) to replace your LNBF with a DPP500+ w/DP Dual for the 129