Interesting.
Would it work with Magura HS11?
Won't the HS11's hose interfere with the Brompton's luggage block?
What about installing a U-plate
in the back of the fork, like shown in
this tread from 2015?
What's the difference between the four models of rim brakes Magura currently offers? HS11, HS22, HS33, HSI.