Ah but Leigh, he has gone on to state that he DID find a use for that philips head by grinding it into a Marlin Spike. That's ingenuity if you're not going to be unscrewing trees.
And carry a decent dedicated folding saw. Redundancy. SAK is last call. Is a Sak your 1st choice of carry for a blade when going out? Then why should it be for the saw blade?