Looks great and good to hear have finally finished it.

I have also purchased a GFS MM '3' wire HB pickup for my MMB4 build and having a hell of a time trying to find best way to wire it up with a blend pot on the Belcat pre amp that was bought on eBay. Agree that when in series as a proper HB it does sound good however a few of the coil tap variations done so far seemed to do very little. The DPDT mini on-off-on switch idea was another option but from what you are saying that might be a waste of time & money?

Cheers, Waz