The bases have been removed already and yes, there was considerable core rot around the old holes, which I removed and then filled with epoxy. (following the excellent recommendations at Maine Sailing's Photo Galleries at pbase.com
. Yes, you are right, I believe there probably will not be rot issues again, and leak issues for quite some time again, but the idea of water pooling in the stanchion base with no outlet just seems like I'm asking for sealant failure and leakage sooner rather than later (five vs ten years? Ten vs. twenty?). Perhaps I'm over concerned?