The Numidian Legionary unit is certainly a slightly reskinned RTR unit - I did a small reskin of it a few weeks ago myself
I am proud to be part of a team which is glad to share its work, and I hope others will follow its example. I would take it as a compliment if someone chose to use my work, but it is always better to PM people and make sure they are fine with it, as well as acknowledge their work when you preview it. Saves issues like this...