@rickmurnane
My only other secret weapon when dealing with undersaddles is an LR Baggs Para-Acoustic DI, which has some handy features and a five-band EQ section with selectable midrange and a notch filter.
I only have two complaints about it: the fx loop is a stereo-jack send-and-return, which doesn't play nicely with a lot of common situatiuons, and whatever adhesive they use for the backing isn't all that great (so the backing tends to slide off). The latter, of course, is easily addressed at any home improvement store. 