sorry gents - should have been a bit clearer.
I'm thinking about how different profiles require different applications of power and the individual's 'individualist' approach to applying them.
I have been sat in seat where pilot thought a quickstop and 'snatch' of power at the end was a good way of approaching and thought the geartrain would not 'like' it.
thank you for clarifying PC1 profile and HFDM following.