There are many more headlight mounts to get in addition to what shipped with the Light,
Some are made to use at the fork crown with cantilever brakes .. B&M , Schmidt, also thru PJW Cycles.
+ you can change the length of the transverse Cable to clear the New Mount without advesly effecting Braking
[although internet based mechanics read stories of the tiny % difference that makes and think it's drastic,
though less than 1%.]
..