Wow really? Can I see a full pic of him???
When I first got Eddie I was certain he was a mixed breed too, most definately has SI in him but some things I couldn't figure out. His beak seem larger than SI's I've seen in bird shops. Eddies breeder (along with plenty of other breeders) didn't know what sub species they were breeding & just mix them up & sell them as Ekkies.
What size is your SI?
Eddie is the normal 35cm but relaly thin (healthy too

)) )