is there a way to tighten pins in tube sockets?

I forgot to mention. They will raise your tubes about an inch taller so if you have a cover over tubes make sure they will clear if no cover no problem.

+1 for the socket savers ONCE the pins are tightened. I got the ones from the tubemonger and I will say the sockets on the saver are real tight. I had a loose socket where the bias would drift and lost some pretty expensive tubes as a result before figuring that out. For me I had the sockets replaced first.

I was thinking there might be a "special tool" for performing the tighten operation. Since I work on BMW's, they have a "special tool" for everything. I'll take a look at the amp this weekend and see what's possible.

Mission accomplished. I used a jewelers screwdriver. Once the amp was out of the rack and on the dining room table it was easy to see the pin receptors, two curved and one flat in each hole. The amount of adjustment was slight to achieve a solid fit.