What are the best tools for laying out a drill pattern?

I've seen the quarter scale and the turbo 2-n-1.  Are the essentially the same thing, or is one better than the other?

Also, what are the other things listed on the Jayhawk page?  Are they needed, just helpful, or not even necessary?

http://www.jayhawkbowling.com/Products/layout.html

What about something like this: http://www.nationalbowlingstore.com/spanruler.asp

Is the armidillo strictly for finding the PAP, or does it have other uses?
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Haywood

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I don't need a stupid
signature. This is enough.
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I have the Turbo Pro Sect as well and it works great.

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