So then is that called a push/push pot?
I found these:
http://www.guitarpartsresource.com/e...shpushpots.htm
And to answer your other question about longevity, I found this:
http://www.fenderforum.com/forum.htm...-08-0809:30:00
http://www.fenderforum.com/forum.htm...-04-2613:25:34