Hi guy's !.......a friend of mine has a 2204 circuit board ,......I'm tempted to have my tech install it in my Vintage Modern and also install a choke and tube effect loop . Of course ,there is some work and tweaks involved but I'm on the edge of doing it unless someone tells me that I'm going completely crazy !!........haha! If you find it a good and exciting Idea ,.........let me know what you would do with all the extra knobs and both HDR-MidBoost push buttons !? Thanks!