Changing PPI on a saw

[David Weaver]

Ditto to above, big mill file. If you need to, cut a groove in a scrap of 4/4 material that's a snug fit for the file so you can keep the file close to 90 degrees from the plate. Have a couple of files on hand to cut the teeth you want, and mark and start them with something that's easy to move on the teeth, like a file with a little wear on the corner.

I've found it easier when cutting teeth to put a paper template on the saw plate and tape it down to start the teeth - the paper is enough of a barrier that you can start with a sharp file and not a hacksaw or a dull file.

Make yourself a guide block to put the end of the file in to ensure that your rake is consistent.