I don't think it's a case of anyone straying from my vision mate. Everyone's endings are unique and valid, that's what I love about this competition/challenge of finish the story. I appreciate your sentiment though of seeing where it was going in my mind when first written :-)
Yes, you are right about familiarity about Bangkok, I have visited once but that was over 10 years ago. My memory is very sense orientated so I find it quite possible to conjure up strong memories of places from a long while ago, the rest I fill out by using google earth and researching. Thanks for reading and your comment :-)