Arrival times

[georak]

I would never say I am a pro, but it was amaizing when recenty I started calculating gate-to-gate flight time, most of the ocassions I
managed to acomplish in 1-5 minute differences. AND I didnt take weather into consideration, only the prediction of departure and landing
directions based on the wind reports. That means If I did it the absolute correct way, I might even be more precise.

So I only worry about the IFR aproaches, where ATC can direct me quite differently to the runway, than my predictions, because then arrival
time can vary significantly. Am I correct when saying these?