Quite so. But then again, and I hate to sound like a broken record here, (is the contemporary phrase "broken MP3 player?") we've noted at some length that (a) the "ambition" tattoos are boxed but pics of DM show them as NOT boxed. (b) the tattoo is further up the arm than most people would wear a watch. (c) the tattoo is on BOTH arms, not just one and (d) the suspect is described as wearing a "long sleeved" orange t-shirt. and (e) while the description as reported is very unclear, it seems that SB did not see this tattoo.
So far we've danced around this by suggesting that maybe he framed his tattoo later than the last available pics (Why?) and that the Really Huge Guy first test drive saw only the tattoo on one arm (although he described DM as "heavily tattooed") and that he must have seen it because DM may have pushed up his sleeve (one sleeve?) while driving the vehicle, thus revealing the tattoo to his owner/passenger. Incidentally, we recall that (according to the tattoo picture issued) the somewhat faded, scripted word "Ambition" is written so that a person facing DM would be able to read it whereas he himself, or someone seated beside him seeing his arm on the steering wheel, would view the word as upside down. If you would care to write out the word "Ambition" in longhand on a piece of paper, then turn it upside down, is it easy to read?
Mind, I don't know the social protocol associated with tattoos. Maybe Really Huge Guy just asked DM "What's that on your arm?" to which DM replied "Oh, that says "ambition". It used to be even harder to read before I had the artist draw a frame around it."