tips for souping up Mafac bakes beyond replacing pads: replace the flimsy front cable hanger( part of the headset) with a stout al-alloy one
as used on non-suspension mtn. bikes or to stay vintage find a French CLB brand one. also shorten the straddle wire. BITD there was an after market
plate that mounted on the pivot bolts called a brake booster which cut down on flexing. pretty ugly but they worked