I'll give you a :-:

rkkwan got the -out because he posted not only an answer but a (relatively) detailed analysis for how he got to that answer so the OP could related to their own situation and modify.

Your reply, while solid, had a lot of variables. Your gait / pace may be significantly different than the OP's.

Plus, your post was a little CD. Who times their walks between gates? rkkwan was a bit more autistic. And we all know the FT community embraces and fosters autistic tendencies.