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geocash · 06-02-2006, 09:02 PM

My understanding is M-20 is a 2:1 ratio, where as a M-15 would be a 1.5:1 ratio.

06-02-2006, 09:02 PM	#15
geocash Registered User Join Date: May 2006 Location: Long Beach, CA Posts: 6	My understanding is M-20 is a 2:1 ratio, where as a M-15 would be a 1.5:1 ratio.