Water pump pulley question

[Nigel Watson]

Knew this was the place to ask the questions. I should write a book about you guys!! Rob thanks for initial explanation. I had wondered if the end of the shaft had been flared after the pulley was on..but no.
The whole unit has just been overhauled so am happy all is ok, touch wood! The shaft is also turning freely with no catching or movement. So a wee chap on with loctite will be tried.

Jack if I fit a temp sender to both sides can one go to the gauge and another to a light (to save having two gauges)? Or should I just put a length of flexible hose from the radiator overflow down the driver's neck? !!!

Thanks again everyone.