now it's my turn to create the shitstorm. I deleted one member for labeling Thailand in a negative way. And I close comments. Neither we nor anyone can predict the outcome when you face IO with a lot of stamp, the IO make decision and he can refuse entry based on many reason (in most case no money as the reason). To avoid such situations get a proper Non Immigrant Visa which reflects your status in Thailand.
depending on your travel plan, you could do a border hop and get 30day. You could also get another 7 days extension on your 60+30, but it would be a denial of extension, but you can get 60+30+7 out of it.
I see many wrong advise, after an ED Visa or extension of stay based on study it is not easy to get a Tourist Visa. First you need to void your ED visa or extension of stay at local Immigration, than it is advisable to check the requirements of the places you want to go. KL , Singapore, Hanoi, HCMC or Penang are options. Vientiane or Savannakhet as well. I close comments as this is thai visa advise and not a place to get knowledge on how to beat the system.
if you go to Savannakhet you basicly use Tony to do some photocopies and you should do so, he is a nice guy. But he not agent as Savannakhet not accept agencies. No paper pushing, just walk in with the correct paperwork, if you miss something Tony can do a print out , etc.