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There is a fair amount of good news in that post, so you are making some good progress!
There are multiple possible reasons for the hot restart difficulties, but one of the first I would suggest checking is the fuel pressure. If the pump is weak or the regulator is bad so the fuel pressure is low, it is easy for the fuel in the engine compartment to vaporize when shut off hot, and that makes it not start until enough new fuel gets pumped up there to have liquid in the fuel rails. I think I would look there first.
There are multiple possible reasons for the hot restart difficulties, but one of the first I would suggest checking is the fuel pressure. If the pump is weak or the regulator is bad so the fuel pressure is low, it is easy for the fuel in the engine compartment to vaporize when shut off hot, and that makes it not start until enough new fuel gets pumped up there to have liquid in the fuel rails. I think I would look there first.
