Voo,

My BJ had the cool bias mod done to it before I bought it. I recently did the twin stack mod (as you said very easy to do) and the mid control works much better in that you can turn the mids completely off and it sounds like the Twin Reverb amp with just the set mid tone down and adjustable bass and treble. When completely off it really does sound like a Twin only smaller and less loud. There is more room for adjustment on the mids from 0 to 4 like there never was before. Great mod. I had planned to do the tone stack mod but after discussing it with you I don't want to bother since I am pleased with the 2 mods I do have and the sound I'm getting with the new Warehouse Guitar Speakers Veteran 30 in the amp. I still get the famous Fender clean chime but now have the tight Celestion crunch with OD and distortion pedals with that new speaker. Good post Voodoo.