Take a lesson from the CBS years of Fender amps. A bunch of well-meaning engineers ruined the character of the amps by 'improving' on the design. A lot of things don't make sense initially, like the small size of the power supply filter caps. They seem like an obvious place to make improvements, but the small cap values result in a momentary sag in the B+ line, which is where that wonderful 'swell' comes from! Be aware that your first guess is almost always going to be wrong.