You got great answers on the caps. Safety trumps sound quality and those electrolytic's are past their expiration date. Quality modern electrolytic's are significantly better that vintage ones so they need replaced.
Jdane; Caps tubes cables do break in. The time varies in my experience. I've found at 50 hours things are settling in. After 100 hours you should hear little or no changes.
Jdane; Caps tubes cables do break in. The time varies in my experience. I've found at 50 hours things are settling in. After 100 hours you should hear little or no changes.