Been a while getting around to the point of feeling like doing an update. The second B&M Luxos has arrived and indeed it is the latest version with the fixed handlebar cable with switch. Nice as that eliminates the moisture issue related to the plug in version. Bought from bike24.com for about $100.00 less than one from Peter White.
I still need to figure out how to mount it on the Bruce Gordon since there is no mounting hole on the fork. I’ll need to drill a 10 mm hole and jury rig a threaded stud to mount the light at the fork crown.