Offer arrived, can I still ask for more? - what worked for you?

I want to negotiate but I am afraid they will withdraw. I have been trying to stay organised about it. The hiring manager was friendly and open. Did it backfire?

I thanked them and said I was excited but hoped we could talk about the pay. They came back with a bit more.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.