I just bought a Classic X MKll with a 3CX1200A7. Are there any 'do's and don'ts' with this amp? I also have had a 3K-A I bought new so I am not completely unfamiliar with the Henry units. Any comments from anyone would be appreciated. Thanks. Dave Harmon K6XYZ[at]sbcglobal[dot]net Sperry, Ok.