Nick have a look at the "Jap"? 5 bands with three outputs and diode OR LPF suggestion that I just posted before you go too much further.. just a heads up.? THe design needs rework for lower power ,? but it is not too bad.? It can be just std double Pi design without all the magic bypass cappies - there must be books that cover that but I don't have one.
Remember too that a BPF board looks as if? required to cut right into the cct . thought it may be with a well designed LPF board that latter may be dispensed with.? That may affect your layout to produce a one size suits all.
