@Andi **********
just be sure the border chosen will stamp in a DTV Visa holder and whether you need to stay outside of Thailand one or two days before reentry.
That's why I recommend the use of an experienced border run service company with a same day return.
Or fly out with return a same day. Be careful of Chiang Mai Thai Immigration Officers at the Airport. They're questioning DTV Visa arrivals. Suggest you carry with you the documents used to get the DTV visa.