In fact they have got it totally wrong. They removed 19mm from the rear section not 19cm so I am dropping it off tomorrow to have the further 18.81cm taken out plus the other 25mm from the output part, pre bearing. Oddly I wrote 19cm minus in marker pen plus attached a not in bold to say cm not mm. Never mind, they have been great about it and think I can drop it off on way to meeting and pick it up on way back.