Kap Cheong (Surin) / O'Smach border run update: I crossed into Cambodia at O'Smach today. 1500 baht for the 1 month single entry visa to Cambodia. 500 baht penalty for not staying at least 24 hours. 300 baht for a "guide" who found and filled out all the documents including TM6. 300 baht for the Thai immigration officer to not ask for the 3 proofs for a "visa free" entry of 60 days. All over and done in 30 minutes.