What temp on hot air station to desolder

Hi:

I am fair at soldering with an iron, but jut got a rework station at a price I couldn't resist. I've never used one before.

I want to desolder one of the connectors on a Raspberry Pi CM4 board and solder on a new one. If Perplexity is correct, that is connector is a Hirose DF40C-100DS-0.4V.

My questions: First, what temperature and wind should I use for desoldering the original. Second, how hard is it going to be to get the replacement connector in the exact right position. It looks like there's very little margin for error here, as this is a snap on connector with its mate.

Thanks.