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No other test matters.

At least the HHT won't rust your edge. ;)

Why would you sllce an acidic fruit like a tomato with your razor ?

Also how much pressure are you applying in lapping. It is easy to embed paricles into a Norton. See ? the 'pressure' thing again. :)

Give it a try. You may find it goes quicker than you think. Without getting all mystical, just focus your attention on the edge. A little torque helps too but like the law of diminishing returns...

I would respectfully suggest that finger pressure has likely had the opposite effect to what your plan was.
Go slowly, use a light touch & one hand as much as possible. Pressure is the most greatly...