Alright...installed the tubes today. First thing that happened was my fuse blew (within about 5 min). Called Eurotubes...they were helpful. They instructed me to inspect the tubes, but I did that before I installed them...inspected them again anyway...seemed fine. Eurotubes also mentioned that it's possible that my fuse, over some time, may have gotten used to carrying a lighter load, and when I put all new tubes in, the fuse said "WOOOAHHHH!" Sounds feasible to me. Off to Radio Shack...new fuse installed, working good so far, but...my FX Loop has basically no power. What I mean is, all the effects running through it are barely audible. That wasn't the case yesterday with the old tubes...what the Hell?