Cape Dory 27 Mast Compression Plate

[sailor_grant]

Hi All -

I have noticed that my thru-hull wiring hole was not properly created and has likely allowed moisture to ingress around the mast. I am worried that this will cause corrosion of the steel integral mast compression plate or the wood core.

Does anyone know if there is a wood core where the compression plate is or just a steel plate? Does anyone have experience with this?

Thanks!