I was reading your thread on your Smart Tab installation and I was wondering if you could go into a little more detail about how you avoided cracking the gelcoat? What size countersink bit did you use? I guess I'm not really clear about how to chamfer the screw holes. I've just received my Smart Tabs and will be installing them soon. Any other tips you could offer would be great.<br /><br />Thanks for your help.<br /><br />Brian