@Jim *******
torfx don't charge at all, I've downloaded their app and talked to them, I've asked them about hidden fees and was told they don't charge to transfer any amount, if I transfer from my bank to theirs then they transfer to Thai bank and said it should be in my Thai bank account within a few hours. As I say, I haven't used it yet, but they have great reviews and 91% 5* on trust pilot.