Part of the pinstripe morph is the dorsal stripe-that's lighter colored, and the 'pinstripes' that run along both sides. Anything you breed the pin to *should* have the dorsal stripe, the pinstriping can be affected by whatever morph it was bred with, but depending on what it was bred with it should still be noticeable.
As for a perfect pinstripe, that will be harder to find. When I was looking for a pin I probably had a hundred to choose from at the Tinley show! It was easy to narrow down the selection because I wanted as close to perfect pinstripes as I could get, and a lighter pin. There were several pins at the show that had a perfect stripe, no lines crossing over the spine, no specs in the dorsal stripe, but they were dark pins. You also have to decide if your perfect pin is busy or reduced. For me, my main concern was the pinstriping and the color.
This is the girl I picked out. She has a few specs in her stripe, and one crossover, but her color is really nice. I got her to make jigsaws because I absolutely love them. I can't say if the jigsaw will have really nice pinstriping or not, but it will definitely have the dorsal stripe. I don't know for sure, but my best guess is that if you get a really nice pin you should get some nice pin combos, you might still get some eh ones, but a reduced patterned mate should help with that-selective breeding. I'm breeding her to my reduced mojo once she's big enough, so we'll see what happens!
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