I don't have a UVJ in the mix, I am just using a 4 output splitter to combine all my antennas, I will see about getting one.
Do you know a good place in Burlington to get one?

I think I might still put a low pass or band pass filter in the mix as well, though one thing at a time.

I just took a look, never thought of it before but I have the older CM7777, with dual input one UHF combined and one VHF.
I should be able to just feed my VHF antenna directly into that instead of combining it before with a UVJ, should I not?