Well, first off any of the morphs are crosses. I believe they have proved a pinstripe as the only morph a true SD can produce. To the best of my knowledge, the indicators are the head scales and eye shape, the extremely docile temperment, and size. Mine are 50% related. The mothers are around 5' and the father was a little over 4'. These are full grown animals. I found some good info on www.retic.org and a bit more on www.thereticnation.com It is really hard to track down good info on SD with all the secrecy concerning what island they are from and where most importers and breeders stock come from. True SD are much smaller than the dwarf retics. When they start crossing them to get morphs you end up losing a lot of the SD characteristics from what I've read.
Regards,
B