@Mark *******
, you will get different experiences from different people on the border bouncing on a Non-O multiple. I know for sure that Poi Pet Cambodian border is not a station you should use for it. But if you stay one night outside Thailand and arrive by air I guess most experiences will be positive. However, the substantial requirements for getting the Non-O multiple at most embassies are the same as getting an extension at Immigration, but the paperwork is more comprehensive at Immigration.