Sir, I hope it was not your intention to sound very condescending and imply that I have no real understanding about the uniforms worn by the 79th let alone how to do it accurately.
If you'd re-read my post, you'll notice that I quoted, and was therefore referring to, the original poster, not you.

Billy's initial question was in regards to the Kilted parade uniform worn by the regiment and I answered that staying in the scope of his question.
No; you assumed that. Nowhere in his original post does he state "Kilted parade uniform". One can just as easily infer that he erroneously thought that the 79th NY wore kilts all the time.

As you're the resident expert, precisely how many times is it documented that the average infantryman in the 79th wore a kilt after the parade through New York City that was photographed on June 1st, 1861?

Enfield or Springfield; my point is that to accurately portray the life of an average soldier of that regiment during the War, it sure as hell wouldn't be in a kilt!