Can I expect to see any real increase in watts when I do the switch to kt-88's in my YBA-200? I've done a search and some say yes and some say not really. Anyone have real bench test numbers after the swap? I'm planning on doing the eurotubes "special" YBA swap with the JJ's..with the 12at7's..for more clean headroom. I also have a BDDI to add to the mix for a little overdrive and boost (into an 8x10.. and a 212 when needed) . I guess Im trying to make this head into what I maybe shouldve bought in the first place-a 300 watt tube head.