Here is a link to a genetics calculator: http://www.worldofballpythons.com/wi...4&female=73,84
So yes you can get a pinstripe super mojave from this pairing. The thing is that the super mojave genes override other genes. Genetically speaking a pinstripe super mojave is great, it will produce 50% mojaves and 50% jigsaws when paired with a normal, but the snake itself will look like a regular super mojave. (Some pinstripe pattern might be visible under a backlight)
Your percentages are correct.