Send them to me and I'll take care of them
If I were you I'd do this..... Talk to you tech and ask him if he wants to earn the easiest $150 in his life. Then say here's the deal, hold onto my amp and guitar for the next year and once a week play the amp for a few minutes and I'll call you the week before I get home for a setup on the guitar.
Most amps benefit by being played and sitting for extended periods of time is not good for the long term.
Wait, I assume the gear is worth a couple grand or no?