If I might ask, who was your surgeon? And do you think that your scar is really only susceptible to stretching while it's healing, or when it's literally just a scar do you think it can get bigger? I was wondering if you could also post a picture of your scar/donor area. I'm really interested in seeing it.
A couple of more things that came to mind...I'm really, really leery of FUT anyways because of cases like that, but after looking at Dr. Rahal's track record for thin scars, I feel a *little* more comfortable letting him and only him MAYBE do a FUT. I mean I'd rather have a FUE done honestly, but like you said, donor hair is limited. Have you thought about filling in your scar with FUE? If I did go through with a FUT and then later on my hair (namely my crown, since front and mid scalp would have the donor hair implanted from a FUT) started thinning more, I could then go with a FUE...maybe for the crown and to fill in the scar at some point if it's an issue. I don't see myself having my hair so short on the back that the scar would be visible, unless the worst happened with it.
By the way, thanks for getting back to me on this, all of you. It feels good hearing personally from others who have been in my shoes before.