I would go with the 2 blade. I have also heard that the two blade is not as reliable. And if you are worried about the blades popping out take some rubber bands for braces and put on the front does not affect the flight or opening but it is not necessary. Also do not let people try to fool you in to thinking they will not blow thru a shoulder blade they will do it. Do not recommend it but I shot a doe thru the shoulder last year (I am human it was not on purpose) and it blew thru it and was sticking out the other side of the deer. But you will have to replace the blades but it is not that hard. Enjoy them and be prepared for a heckuva blood trail. (provided you dont shoot it in the butt
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