I'd suggest getting the filter daughterboard for the 7030+. You can add
two extra filters without removing any filters from the motherboard.
Javiation installed the filter board and one of the crystal filters,
and still came out as the lowest price. I don't know if you get that
kind of service today, but it wouldn't hurt to ask.
I use the notch filter in the NB option quite often. I can't say I use
the noise blanker itself very much.