Trouble is (and I'm not a hoarder as such) but I keep stuff, thinking " That will come in on another job and I've already got one " Trouble is it hardly never seems to happen.
I threw out some good condition standard Wylex spotted carrier boards ,which had been removed in the past. The reason they were there was I once replaced the guts on a burnt out way on an 8way for an old dear who was getting upset over the cost and didn't understand the Regs had moved on (should have replaced with a 16th)
So just replaced the guts with one we had taken out ...