As always, thanks for the great advice on this! I'll definitely take your advice on further sanding the inner skin. I forgot to mention that I'm probably not going to be able to vacuum bag any of the patch, just given the remoteness of the yard and the distance to a power source. Should that affect the decision on which type of core at all? If I go with balsa, can I rely upon natural forces to pull the resin into the end grain balsa and form a strong bond?
