I'm with Keir on this one.
You'd be amazed what you can pick up in a class below you.
I came off a Line Mechanics Refresher course last week and I thought I wasn't going to
learn a thing.
Well bugger me, it turns out I've been using the wrong span co-efficient (sag) for hard-drawn copper (solid) for the last 5 years, not serious, but silly all the same.
People that complain about bettering themselves worry me.
Let's face it, these days if you're not young, you're old - Red Green