Everyone else uses a stationary pad on Mechanical brakes,
Even the New Paul Clamper .. but the claim is its feature : easy to turn the Knobs to do the pad wear compensation..
... But TRP in their Spyke/Spyre ..
IRD and Gusset Double banger never made it into much use ,.. OEM spec builds Especially..
A front hub with the Centerlock spline lets the disc come off easily and so gets packed separately to remain Flat.