Thanks everyone for your input. The Lace looks very interesting, but I am suspicious of tape that "does not damage finishes". Just to make it more fun, the mouse has the fingerboard extension as a thumbrest so getting purchase onto both sides of the end of the fingerboard is not an option. I really like the concept of mounting it over the strings. I could craft (obv I mean pay someone else to) an all in one wooden pickup cover which would be like a P pickup cover, but wooden. This could contain any sort of pickup I like so depth would not be an issue.
I welcome further thoughts from the BC Masif.