I got this today. 200 bucks. 1965 Gibson GA-5 Skylark. It sounds like Jesus. I found a guy in my area selling it off of craig's list. It has a new speaker ( Mojo Tone) and new tubes. Again it sounds amazing. Should I be concerned with the caps or other electronics inside? What else do you guys recommend I do to make this amp last another 43 years? Thanx, Brian.