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Default Rebedding keel & backing up bolts

This is a continuation of a previous thread. I have a couple more
questions.

After I drop the keel I plan on grinding out any cracks and or
delamination. Then laying down more glass and epoxy. I have some
Kevlar matte. I would like to know if this would be good to use under
the keel bolt nuts? Or should I just stick with regular Glass?

Also, would it be a good idea to use larger backing plates under the
keel bolts? Instead of just the 2" fender washers. Maybe a S.S. plate
that would span two or more bolts.

There are (10) 3/4" S.S. bolts with 1 1/8" nuts.

I will lay the glass down let it set. Drill the holes again. bring the
keel back to the hull. Tape the threads of the keel bolts.Then place
some thickened epoxy in the area of the plate. Wax the plate really
well. Place it over the bolts and draw it up slightly. Then let it set
up. Then torque to spec. This should give it a good even, flat area to
carry the load.

Finally. Any opinions on glassing over the hull to keel seam? Maybe
using the same Kevlar matte. Extending the matte vertically 6-8"
beyond the seam.

Thanks again,