I'd check other pieces/parts of the system to make sure something isn't causing the failures. 2 failures in one car doesn't add up to me. Terry Haines had mentioned to me that some of the higher end fluids like ATE super blue, etc, tend to eat slave cylinders. Might also check out the master cylinder to make sure it has proper operation. A guy I did a swap for a long time back had the master cylinder let go after just a couple hundred miles and ended up ruining the new clutch, pp, flywheel, and slave cylinder.
Rick
