Does anyone have any experience of using both Pedros levers and Park Tools levers? I would be interested to know how they compare in terms of strength and thickness of the blade. The reason I ask is that I have the notoriously difficult Mavic MA40 rims and NOS gumwall Specialized tyres with a Kevlar bead. Unless the weather is very hot and my thumb muscles are in tip top condition it's almost always necessary to use levers to get the tyre off and back on again. Fortunately I discovered my last puncture at home but broke my all time favourite old PMD lever from the 1980s. Putting the tyre back on with Park Tools levers caused me to twice get nip punctures in the tube. I don't fancy repeating that experience whilst out on a ride!