I am having a hard time deciding if this is a crack or not. My first thought is that it is a crack. The more I look at it I think it may be a grind mark from when the intake was set. This is a 21' Daytona with a full set back pump. I tried using a .006 feeler gauge to determine if it is a crack but it will not go. There is no evidence underneath the boat to indicate it is a crack. That brings the next question, If it is a crack and it does not extend all the way through, could it just a superficial crack in the extra resin that collected in that area durring layup?