I've played around enough with my fixed bias amps that I've figured out I generally like fixed bias Fender amps set in the 55%-60% range. I don't really shoot for that level, but playing with it long enough and tweaking it to what I like with my guitars, it seems to always be the area I end up setting it. But, that's easy enough to play with using a bias pot. I don't have wide selection of wirewound cathode resistors on hand, and would like to avoid a useless endeavor if possible. Using my 5e3 as an example -- does anyone here set those with cooler bias or prefer it instead of the "safe 100%" level? Mine is set up with a 330v PT and around 370v B+ using a 270R resistor. I've measured it before and I can't remember where it was at -- 100% +/- 5% maybe. So, it's not a situation where I'm running 420v in my Tweed Deluxe and need to change it. I'm just wondering how much effect it has?