And the final verdict is, it does work.
The B string does not thunder like the 64' stop on a church organ, but in my heart I knew that would be the case. It will probably be a string for special occasions only. But if nothing else, it will remind me that I am now more used to a 5 string than a 4 string so muscle memory will not have to adapt
The original preamp sits nicely with the pickup filling out the lower register nicely.
In case anyone has ever had any doubts about Jez's abilities, the man is a wood whisperer.