there is a metal rod implanted in the underside near the LE tip of the wood blades. you can see it through the covering, but it's very easy to see once the covering is off.

atcspaul, i suggest weighing & cging the blades as you coat them (while wet). pu coatings don't go on well in multiple coats; you usually have bonding issues going over cured coats, even with sanding. otherwise you'll have to use tape on your beautiful blades.

-kev