Were there any notable difference on failure rate between chrome and black button?
My Cutlass 5.1 is chrome button and it never gave me any problem, where as my Destroyer is black button and it used to act up once a while although it's been working flawlessly last couple months. I was wondering if the black coating inside the button has something to with it. My friend's Cutlass 5.1 has black button also, and he said he used to get occassional mis-fires for first while but then it all went away and works perfectly now.
You're on the right track in your thinking. The Stainless steel (SS) switch failure is about 2:1 over the Black and Chrome, and the Black and Chrome are about even for failures. I have stopped ordering and stopped using the SS switch and have just kept a couple on hand for repairs/replacements for people who insist on SS instead of the Chrome switch.
I wish I could find a push button and catch cup combination in a nice Brass finish. I think brass as hardware would look so totally outstanding in appearance. Ah well, haven't found any yet ...