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Quick and dirty build ... cut to fit. Sanded lightly so no splinters
and then white carpenters glue to hold the balsa in place. No
varnish on the base... nothing fancy.

The common wisdom...

Building this green monster taught me some things.
46365
The dimensions are a bit large for a CrOx balsa hone/strop.
It is 4"x32". The base is exterior grade plywood and the
balsa is common...