One of the Chevra, you are not being very specific. Actually, he is not going against any Mesora. He is merely giong against the famous picture. Yes, the Luchos were at Har Sinai but not necessarily during Matan Torah.
Who got to see the front and who got to see the back? Was that also a Ness that all the Jews got to read it or did nobody see it anyhow since it was covered with smoke? Doesn’t the Pasuk describe the giving over of the Luchos on the last day that Moshe Rabbeinu was up there?
If you have something to show or somewhere to look please, by all means, post it here.