How many people wish they could maintain and/or service/modify their own tube equipment?

Some shouldn’t ride Harleys, or Skydive.      Some should never pick up a hammer(for any reason), or soldering iron(near tube gear).      Some things are harder to get killed with, than others.      Gravity and high voltages, can prove very unforgiving.      Then again; the only people that never fail, are those that never try.      AND; there’s only one way to learn self-reliance.      The competent generally aspire, to rely on themselves and are willing to learn(yes: they would be interested).

I will do maintenance such as replacing tubes, bias adj. and simple repairs like a switch, lamp, bias resistor, etc... but if I can't easily troubleshoot I will send it to a pro or ideally where it was made

Fortunately I have excellent soldering skills.  I started working for my uncle at 15 .   He used to make black boxes for cable and I would remove the PROM and solder in a socket so he could burn the descrambler PROM and plug it in.... I got "paid" with black boxes.for the work . I kept a few and sold a bunch.    I have been into RC for 30 years so that soldering skill was handy.  I also solder routinely for work where we use a Pace rework station.   

It's a skill that's easy to learn but takes a while to master ,  with the right tools and some practice anyone can do it

I should add that you need to really be careful with tube amps because the internal voltages are lethal.....