Here is something to think of, if there is a fair amount of side play on the c clip axles it could push the caliper piston back on the 8.8 axle then you need a lot of fluid to push the piston back out to the point where it clamps the brake pads again.
If that is the case a master cylinder with larger pistons would help mask the problem
interesting point, i guess there's a reason the german cars have floating calipers
you're probably right, that makes total sense.
to expand to that, can also happen if your front bearings go out of whack (same idea or even worse maybe)).