Just did a trip to KL airport and turned around and came right back (to DM airport). I have 3 previous SETV and a few more ins and out (continously). Had 20,000 baht with me just incase.
They didn't bat an eye lid.
Immigration was dead, no queue got through in about 30 seconds no problems with visa exempt.
Just incase anyone was doing the trip soon and was worried.
TLDR : Answer Summary
The user shared an experience of a quick trip to KL airport and returning to Don Mueang airport in Thailand without encountering any issues regarding their visa exempt status. They mentioned having traveled previously under a SETV and expressed that the immigration process was fast, taking only about 30 seconds with no queues. This post aims to reassure others concerned about similar travel plans.