I used the Plast-aid yesterday (finally). It was a bit difficult to work with, because it's not smooth. Probably the main difficulty was the awkward location. But in any case, it's not leaking anymore, so problem solved. I'm pretty sure epoxy would have worked well also.
One note--that Plast-aid must be horrifically smelly. I was wearing a respirator with organic vapor filters (the same one I use when handling muriatic acid), and I could still smell the Plast-aid a little bit.
There have been a couple idiots that leaned on my plumbing recently, including right on the control valve. (Apparently, plastic and PVC are easily confused with iron railings.) At the time, I didn't say anything, because I thought I was overreacting. I'm not going to hold back anymore, because I am now wondering if the flexing and stress they put on the joints caused this little leak. A little hairline crack or pinhole is all it takes.
