I am thrilled for you and with you. So many of us long for that day which never comes. I have one dgd who loved all of her pretty dresses and had photos taken of her wearing all of them and one dgd who won't get out of shorts and ugly tee shirts for anything, well she wore a dress to her brother's wedding but THAT'S IT! I was sorry to read of your troubles with those footprints on the HP shirt, do you think it was ultimately a problem with the size of the design? I've had problems with tiny lettering but another problem with tiny dots turned out to be that my machine needed adjustment. I didn't know that until after I'd experienced what you had, thread breaks, hair tearing, a couple of bad words, etc.
Happy Sewing, Carol