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Well this may be true, but a hht5 usually gives a good shave and is a great sign that your honing is done.

A couple of things I found which helped me be confident throughout the progression, and learn how to feel the edge without testing, was using the marker, and using pressure.
If you have a practice...

Just in case you haven't tried it, wetting the hair/drying it a minute or two before your test might help. You might also find rubbing your palm on your arm a few times might help. Another problem...