Somebody posted here recently that aero levers give a 10% increase in braking power, so I decided to try a set on my PX-10. The Tekro and Cane Creek levers are are hard to resist, but I just can't see putting them on a vintage 1974 bike. I've been holding out for some Campagnolo levers, but not having much luck. The last pair I bid on went for $100.10 on eBay.