503: this connection seems to be easier:
http://snag.gy/XPw1g.jpg
I only hope to find the right stop (and bus, haha, hope thereŽs only one 503 line:-) ).

khlongsaensaep: well, if the Asoke/Makkasan is easier, IŽll change there. Anyway, interesting interchange on Friday evening:
"Come here: to catch the underground (MRT Phetchaburi), visit Siam Society museum and cultural centre, or experience red-light district Soi Cowboy."

Asoke chosen, thank you :-)