I don't know much about the granite but I do know that the pinstripe and spider morphs are not co-dom. The spider in an unproven dominate and the pinstripe is a dominate. A pastel is a co-dom though. Other co-doms like the BEL complex is a good place to start. I have yet to meet a person who is not in love with a perfectly white snake. Or you could go for something like a puma, which is a spark/yellow belly, or an Ivory which is the super of two yellow bellies. It is up to you. You can use BHB Reptile Genetics Wizard where they have all the snake morphs broken up into dominate, recessive, co-dom etc.