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.
Guitars/Bass - MIM Fender Classic 50s Strat, MIM Fender Standard Strat, Squier Classic Vibe 50s Tele, Gibson Les Paul Studio, Epi '56 Gold Top Les Paul, Martin DSR acoustic, Sigma Martin Auditorium electric/acoustic, Squier Jazz Bass.
Amps/Cabinets/Modelers - Model 2558 50 watt Marshall Silver Anniversary Jubilee combo w/ Celestion Vintage 30s, 4x12 Marshall cabinet w/25 watt Greenback Celestions, Fender Blues Junior w/ a couple of Billm mods, Line 6 POD 2.0, Roland Micro Cube
Pedals/Effects - Cry Baby Classic Wah, Boss TU-2, Boss NS-2, Boss RC-2 Loop Station, Ross Compressor, MXR Micro Amp, Danelectro FAB Echo, Danelectro FAB Chorus, Danelectro Chicken Salad, Marshall Guv'nor Plus, Marshall Echohead, Duhvoodooman's Zonkin' Yellow Screamer, Digitech Digiverb, Digitech Bad Monkey, Dunlop Fuzz Face, Homemade Loop Bypass pedal, Duhvoodooman's Sonic Tonic (Maxon SD-9 clone +), Voodoo Labs Superfuzz