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Hanks Deuce: I like the air cutoff. Do you have any more info on what materials you used, design, etc?
EDIT: found in further down in your thread - http://blastgateco.com/
When I put a 6.2 in my M715, I tore down 2 running engines to refresh, and they had cracked mains. The 3rd was a charm... Not saying that they all are bad, just my experience