"Edwin Pawlowski" wrote in message
He'd building a deck. Cutting the 45's on the end of a 12' board on a
tablesaw will be a PITA.

Agreed. It's a deck, not piece of ornate furniture. Even if there's a little
splintering, it would go unnoticed and if it doesn't, it only adds to the
rustic nature of decks. A suitably sized speed square is all that's needed
for a deck.