Andy,
I have used three different models of the BESS tester over the years. Unless you are planning to use the tester to document scientific testing, in my opinion, the enhanced accuracy of the A model is overkill. For a sharpener testing his work, the B accuracy is more than adequate. I recall Mike saying the same thing.
Incidentally, Mike passed away. He was a very good person and will be much missed. The business is presently being run by a family member. The edgeonup.com website has some excellent videos.
Ken
I have used three different models of the BESS tester over the years. Unless you are planning to use the tester to document scientific testing, in my opinion, the enhanced accuracy of the A model is overkill. For a sharpener testing his work, the B accuracy is more than adequate. I recall Mike saying the same thing.
Incidentally, Mike passed away. He was a very good person and will be much missed. The business is presently being run by a family member. The edgeonup.com website has some excellent videos.
Ken