Hi Mark, we must be one of the lucky first few 😎
I have the 65" and have used my previous wall mount and have had no issues. I got the wall mount from Argos a less than a year ago and is the one for all brand with tilt. They do a flat version also if that's what you want.
Question, how hot is you're slim one box getting? I have an IR temperature device (Lazer temp) and mine is hitting 51.5c. I have contacted Samsung CS directly and they have said it is it's normal operating temperature! Either way it's hot to the touch 😬