or circ saw and parring to the line? When you are comfortable with the hand saw, there isn't much clean up needed after sawing, to my surprise. In my opinion, parring is more work than sawing.
why pare? cut to the line. split it.
use a guide if needed. when you are comfortable (or develop techniques) with a power saw, there isn't much cleanup needed.
but, work with hand tools if you want. its all good.
