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I believe you did well. Don't worry about the 2 handed technique. The blade doesn't know if it's pushed with one or both hands. That you don't lift the spine is the most important.
The HHT indeed is...

You seem to be a careful honer, that doesn't do more laps than needed, which is a good thing. But from what you describe, somehow you ended up with a very rough edge, possibly caused by a number of...