After 25 years and 15,000 miles it was time to change the Pantera clutch master cylinder again. It was working fine but weeping a small amount of brake fluid from the back piston seal.
I remembered that it was not much fun changing it twenty-five years ago and adding 25 years to my age did not make crawling into the footwell on my back any easier. But, I got it changed without too much pain and it is working well.
It is a new stock type master purchased from Pantera Performance and Dennis bench tests them before shipping, so you don’t end up going through the installation and then have issues.