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Joined: 14-October 05
Member No.: 252239
Xbox Version: v1.6
360 version: none
From looking at the tutorial even though it looks like pins 13,14 and 15 arent used they must be other wise you wouldnt need to solder them in, so the answer to your question is NO you cant use a 12 pin header you need to use the 16 pin header>