You never know until you try it!
I tried some other soundhole pickups (RE) I have, but didn't like it. But today I thought to try an old passive Fishman Neo-D Humbucker. Now, I put it in my 1993 Lowden LSE1, which has an undersaddle pickup that is woeful, and then ran it to Tonedexter using it like a modeller, I guess.
So after trying a few of my existing wavemaps, I put on the one I made of my 1935 Gibson L50 and ...I love it! The Lowden sounds not one thing like itself and not one thing like an old Gibson L50, but it is a really nice sound....40 times better than the pickup already in the guitar and way better than the Fishman Neo-D direct. I don't like them at all, but who knew? Tonedexter polished up the soundhole pickup very nicely.
So here is my short solo vocal/guitar version of Dylan's "I Shall Be Released" (there is spill in to the vocal mic of course):
https://soundcloud.com/bk7-3/released-lse1-td77
BluesKing777.