I agree with Alan--the important stuff happens at the high end of the grit range.

But first you have to get a good foundation--meaning a straight, chip-free edge and a bevel that runs to the very edge all along the blade. That's where the 4K comes in. Once you get the razor shaving, you may never use the 4K side again.

The reason I don't recommend creating a burr is that it breaks off and leaves microchips in the edge, which are a real bear to hone out. It's less work to hone until the bevel is good than it is to create a burr and then hone out the damage it causes... You'll see what I mean when your microscope arrives.

Keep at it!

Josh