If you'd like to send the shirts back Andy, we'll put FOG on the sleeve - no probs
It is possible to put FOG on the right sleeve but, it becomes rather more difficult on the smaller sized shirts as, to get the machine inside the sleeve can stretch the material and the embroidery distorts when the fabric returns to it's normal size. I'd liken it to having a tattoo put on your 'old boy' - I'll leave the rest to your imagination

Rather than embroider the sleeve, use a heat applied vinyl?
Don't leave the ladies & kids out either. Rather than post pictures in the forum, you can get an idea of what can be done with rhinestones or specialist vinyls (top row) here
http://smg.photobucket.com/albums/v111/ ... ?start=allIncidentally, I don't get any email notifications when someone replies from this forum, so sometimes I might seem a bit slow

!!