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I'm not saying you should do it every gear change just but not being scared to do it occasionally isn't a bad thing. Maybe it's just me but mine will see 3500rpm every time I drive and it's still going well at 330k on original motor with original pump and injectors.
My td42 is original 1990 370k on the clock, didn't the later td42s have lighter pistons?
In any moment of decision, the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.