Appearantly, the cause of the problem was a too high porosity in the alloy cast causing the rubber to wear out prematurely. The old style cast iron master cylinders may have weighed a little more, but I never heard of such issues with cast iron cylinders.
Sounds very much like buying on price, not performance!
Peter, 66, 2016 Porsche Boxster S No longer driving Tarka, the 2014 Plus 8...
