While I don't have a 20 year old quarter scale. I believe they could do angles back then. Not that they, used it. They didn't have the "Dual angle Method" back then, that's new.
I would suggest finding out how ball's are layed out now and the methods used, Before trying to rewrite the system.
Here's some starting places links
Dual Angle Layout Technique (Most have been going to this method)
http://www.morichbowling.com/Educati...gleSeminar.htm
Motion Enhancement Guide (Pro Sect User Guide)
http://www.turbogrips.com/downloads/...tUserGuide.pdf
A Storm method Lightning Strike PSA Layout Guide
http://www.stormbowling.com/drill-sp...ing_Stikes.pdf
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