@Da**
you don't file a TM30 at Chaengwattana you file it at Muang Thong Thani (like I said in my previous post).
Careful believing everything you read on the inter-web, it might not necessarily be true :P In Bangkok you can "self file" <- which means file on your own without any paperwork from the land lord.
But I'll bow out now and leave you to it, good luck, take care, stay safe :)