Isn't that where term 'board swappers' comes from? When I was looking for a job in Vancouver, B.C., back in 1976, I was told that Digital's (DEC) recently enacted policy was not to train service personel, they just sent them to customer site and serviceman was on his own. Rational was that few months after they finish training, CDC would hire them out. A year after that, I have seen one of those Digital servicemen trying to fix a PDP11 and that cofirmed the rumour.