Cut it along the grain from both sides (180 degrees opposed) using a regular thin X-Acto blade. Meet roughly somewhere in the center. This doesn't have to be pretty since after scooping out the core you're going to glue the two halves back together. Someone mentioned a Dremel, and I would recommend one for the job. Handiest tool ever...........you'll find yourslf using it for all kinds of jobs, not just hobby work.



Joe