i have a couple questions; 1. does anyone know what tubes go into this amp and where i might find a matched set? 2. does anyone know where i can send the amp to have it gone through to make sure everything is doing what it's supposed to be doing? not too worried about time issues, i'm in iraq thru october. so whoever works on it will have alot of time to tinker with it. any help would be great. thanx.