life span/failure rate of filter capacitors?

I’d put money on your amp being fine until you want another brand/type..

@rickysnit , I am hoping you are right; I’d like this amp to outlast me.

I did DM the OP of that thread, and he told me that Cary did get it serviceable and I am going to paraphrase, but he said that Cary gave him the impression that a smaller cap caused the power cap to fail. Electrical & electronics is a weak subject for me; I only know how to solder & desolder & remove & replace & read a MM, so I have no idea if that makes sense or not.

Or it could be a strange individual making up stories for forum entertainment.

Or it could be a strange individual making up stories for forum entertainment.

@rickysnit  , I suppose that anything is possible, but if you go through that thread you will note that the OP had photos (from a shared photo site that are no longer available) of the inside of his amp, and other members of A'gon did comment on those photos.  So if this was a made up story, the OP certainly went to what I would consider extreme lengths to do so. 

Well, whatever I suppose. Are you going to replace to caps? If so, I think you could go nicely upscale for a nice uplift, anything in mind?

Yes, @rickysnit  , I think it would be a good preventive maintenance action to take.  As far as having anything in mind, no, I don't know much about that stuff.  I have been looking on line (including Partsconnexion) trying to find the value I need (400 v, 560 uf) with screw in terminals, but I cannot find anything matches.  I suppose I could do a mod to convert to snap-in or solder, but I really don't want to do that.  I plan on actually calling Partsconnexion on the phone next week to find out if I am missing something on their site. I guess I could also call Cary (sales department, because they no longer provide telephone tech support) to see if they will sell me the power caps by a telephone sales.  Their Mundorf signal caps re priced pretty high on their site, so I am sure I would take it up the wazoo if I bought the power caps from them, but at least I guess I would know I was getting replacements that would work.  I would hope.