Very interesting idea there, mate.. Didn't think of that. Might give that a go!Move your complete front brake to the rear wheel, get a 180mm Magura rotor for the front and use the currently-rear brake with it. Reasoning being that due to weight transfer rear brakes always do less work so for one thing they'll take longer to break in and also need smaller rotor to achieve same braking as front wheel. Your front brake is already broken in so just pop it on the rear wheel and be done with that end of the bike for good (hopefully). Then you'll break the so-so brake in much faster and better on the front and with a larger rotor, plus you'll gain some much needed extra braking torque while at it.