Firstly, Toby is not a pure bred , doesn't detract from the dog in any way , but if its pures your after
Khan has desert blood in him, from his sire is out of "Farha tepe gawra", son of the legendary "Durak".
John Lennons stuff is all Kizzy and Pharo stuff and heavily inbred,so your right to go for a desert type out-cross.
When Vance used Farha over his bitch (smooth desert bred to kizzy stuff, which is what your looking to do), the
litter was outstanding.
One of the bitches was runner up in the Forley.......... and Vances bitch was better.
The "Kizzy" stuff is very fast but