@Francis *******
it's a long time since I used that border crossing but didn't have any problems with it at all, saying that I've also heard negative reports of it. When I used it I didn't even enter Cambodia, paid a Cambodian guy hanging around the office where you get the Cambodian visa to get a stamp for me while I sat with the Cambodian immigration guys in no man's land. Given you're in Sa kaeo anyway I'd be tempted to give it a go. No time limit.