Ditto:man i'm running rag joints on both of my bikes (a 20" schwinn stingray and an occ chopper) with chain tensioners that I made.
going on 4 years on the same rag joints and tesioners without any problems.
I guess if you know what you're doing, you can make stuff work and last. but if you don't know what you're doing, the only alternative is to buy better parts & there's nothing wrong with that at all.
I just prefer to fabricate and build my own parts whenever I can.
I've never had a problem with a rag joint, not one. Installed correctly, properly centered on the hub and aligned with the chain path, they perform quite well. Same for chain tensioners. If the bike frame design, horizontal drop-outs, will allow it I'll forego the tensioner but if I need one I make my own, bridging the seat and chain stay and I've never had one fail or wear out. Cheap too.
If you're fortunate enough to have the skills/tools to fabricate you have no need for aftermarket parts. Especially at the prices I'm seeing for some of them. Of course I understand that not everyone can design, cut, weld and fabricate so there is a place for those shiny gadgets machined from aluminum and cost so much. It's just not on my bikes.
Tom