Steel reinforcement daggerboard

Hi all,

does anybody know what the steel reinforcement in a laser daggerboard looks like?

the background is this: I’building a foil for my laser as a DIY project. Since I believe the chance of success is limited I’m trying to keep the budget low (its all about having a bit of fun during this pandemic). So i got me an old daggerboard which had some rusty lines along the sides (longitudinal to the dagger board), to support the foil. When i cut off a bit of the bottom of the board to better...

Steel reinforcement daggerboard