Curious what your thoughts are here. A while back I posted about my Superchamp X2 with a power tube issue where the thing will intermittently start popping back and get bad static. When this occurs, one of the power tubes will glow really bright compared to the other. I flip flopped them and the issue stayed with the tube socket. I bought a set of JJs but decided to hold off because I spoke to the repair guy that Fender referred me to for the warranty service ticket and he said flip flopping was a good thing to do and a good indication that its probably not the tube. He's an hour away so carving out the time in the schedule has been tough but I'm planning on heading there Wednesday. I stopped using the amp until about a week ago trying to get the issue to pop up again but though it has happened, not as frequently as it was. I am however now noticing some added fizz on the tone in general. Should I leave it and bring as is? or swap in the new set of tubes and hope it fixes the fizz and not the pops? New tubes are not covered by warranty so I'm not sure If I'd get charged if the guy swaps the tubes and decides its fixed if the pop doesn't surface while in his possession.