Well, Stephen and I looked at photographs and discussed it, and both came to the conclusion that the male fire stripe was not homozygous for red factor. He didn't have a male last year, but did have a nice female which he sent as a replacement.
I know I took a lot of photos, but this not very good one is the only one I can find:
I've had her a year now, so I took her out for some photos tonight:
I feel certain this girl is homo red factor/mask/cayenne/whatever. She's as red as I've seen (the camera flash washes out everything), and is very human friendly. I am very happy with her, and the project she is for will continue in a couple more years.