I'M SELLING THIS AMP BECAUSE I'VE GOT TO OTHER AMPS I USE MOSTLY AND I CAN'T JUSTIFY KEEPING SUCH A GOOD AMP SITTING. THE AMP HAS JUST HAD A SET OF GROOVE TUBE 6L6 TUBES PUT IN IT. AS FOR THE MECHANICAL I TOOK THE REVERB TANK OFF SO IT IS NO LONGER THERE. THE CIRCUIT STILL WORKS FINE IF YOU WISH...