"Good" fonts for Thai are a super subjective matter, and my taste about that sucks. lol
I think the current one is all right. Or maybe you can come up with a few diffent fonts (with no more flying vowels) and ask #siamstr folks to help choose which one they like the most. 

 So this is better I think!? https://i.nostr.build/kbK8H9oLnQAgEEiD.png  

 Yes, I like this one better! 

 Perfect. Gonna use this on all other designs. 

 ยินดีรับชำระด้วยไลท์นิ่งค์ 

 Is this better to use? #siamstr 

 "รับชำระด้วย BTC lighting" ทับศัพท์เลยได้นะ 

 หืม ค์ มาจากไหนหว่า
และทับศัพท์จะไม่ใส่วรรณยุกต์ครับ 

 งั้นผมน่าจะจำมาผิดครับ ขอโทษด้วยครับ 555+

https://apbiotech.bangkoksync.com/images/listings/apbiotech-20f2c24982.png 

 Ok @Jingjo so nr 1 is correct https://i.nostr.build/GgDwCPsM4oKjtsOz.png  

 is the ด้วย part really needed 

 I can’t even read it😅 so the #siamstr community will decide what is best. So tell me all friends what is best to use. 

 Yes, it is needed.