Any tuner pedal candidate needs a calibration range down to 432 hz. Because, you know, magic. The magic of keeping random harp players off stage, that is
La Bella Low Tension Flats in medium scale don't appear to be readily available anywhere. A great part of the reason for the Warwick selection is the .100 fourth string. It doesn't look to my eye the .105 is fully seated in a nut cut to .100. Will likely go back to the D'Addario tapewounds.
The Double Four ain't going to shake Madison Square Garden. But you can busk outside MSG with the Double Four and a battery.