Hey guys I just purchased a b60 20 tilt for my 1972 skippy. going to install it tomorrow but had a question about the hull. I am going to put it on the port side deck hatch just before the motor. My question is do I need to worry about a cored hull where I need to do a lot more work to install it. Or is it just drill my pilot hole, drill outside diameter hole and install. Also I will be using 3m 4200 quick cure sealant. I heard it is ok to put the boat back in the water after an hour or so and that the sealant will cure underwater just fine. Thanks for the help!