For future reference, here is how to figure out the math to come up with the surface area for a given hole:
Quote:
Originally Posted by shovelrobert
A = π × r2
1 inch circle
A = 3.14 x 1 x 1
A= 3.14
2 inch circle
A = 3.14 x 2 x 2
A= 12.56

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18.5" One Touch Silver / 22.5" One Touch Gold / UDS / Modded/Restored NB Bandera
Last edited by bvbull200; 09242013 at 05:30 PM..
Reason: Edited to show just the math
