No palm with mine, which is odd since I got it years ago at a Tandy Leather shop, back when there was one next door to every Radio Shack. No doubt Tandy wanted me to by a chunk of bull hide and make my own. I also got a rotary hole punch back then to make various sizes. They sell as seen on YV now as if it was an amazing new over priced invention. If you order now you can get two, Double your hole out put. Make more sense to include the awl for all. I use the punch more making rubber washers from old inner tubes. Big usable inner tubes have gone the way of the free ice pick.
I don't think termites eat leather, with an awl and punch, we could cover our homes with leather or inner tubes.
Now back to the sill.Since the floor doesn't extend under the walls, it would be a good idea to check caulking and insulation right at floor edge while you're there. And, Fireguy, check for fire blocks in walls just above floor, and end/rim joist/band on ends of floor joists.Older Western or balloon frames are notorious for lack of fire blocks.
Measure twice, cut once.
Look at the nail, not the hammer. Watch the fence, not the blade.
If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.