dont care much about the condition of the base, by the time i choose to saw a board in half the base it usually pretty beat, riding in montana is not kind to boards lots of sharp basalt and a thin snowpack.
its more about the time and cost of installing the tnuts, if you are only building one board it doesnt mater much if your building a bunch it gets old.
sorry for the thread jack, diy splitboard class is a good thing you can ruin a board if you dont know what your doing, especially installing tnuts. Use a fostner bit with a adjustable stop, and press the tnut in with a vice instead of hammering. west systems 610 thickend g flex epoxy is your friend.