Tim - this input might be too late but since we are all here to help each other spend lots of money I would recommend using a vixen file.

Here's one on a palm block: https://www.yardstore.com/vixen-file-on-palm-block

And, as a full file: https://www.yardstore.com/10-single-...file-with-tang. (I don't recommend the double cut version.)

Once used, you'll wonder how you ever got along without one.