This was not my idea. Other people have suggested this for a while, but I've chewed on that idea for a while and agree it MUST happen. My recent JJ Jr experience validates that Dave could pull this off, so why not put it out there. We need a Butterslax Jr.
Just to add a slight modification, maybe 7189 instead of el84. In my limited experience with these tubes, they seem to have a little more headroom, slightly louder, and slightly bigger but tighter low end. As far as I know, you can out an el84 in a 7189 amp but you can't put 7189 in an el84 amp, generally, so maybe this tube would be ideal for a 20w Butterslax? Hopefully the tube experts can chime in. For those of you who don't know, 7189 tubes handle 400v and el84 handle 300v. Correct that if it's inaccurate. Either way, let's see what the poll will yield.