If the pin is placed in the same place, it doesn't matter whether the pin is 5 inches or 1 inch as long as you can get the ball legal. Pin length does not matter, or if it does matter, it is very insignificant in comparison to where the pin is placed.
I don't know how well the paradigm would work for your game, I know you have had problems with assymetric balls in the past and personally, I wouldn't take the chance again. Just stick to what seems to work (symmetric euqipment) and leave it at that. No need to get fancy when other balls can do the job and won't be dud's if you happen to drill them wrong.
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stanski