That's a fast one. I bet it rivals a DMT-E.
I keep the slurry from going dry by adding drops of water as I go along. If the slurry gets real dry, the dulling effect on the very tip of the bevel obviously becomes greater.
All that really matters is that you have a fully developed first bevel with flat faces.
If you perform the downstroke on glass with such a razor, it takes less than 30 laps on slurry to complete the bevel. Maybe only 10 or so. But if you're absolutely sure that the bevel meets all parameters, than I'd skip the downstroke and refresh it with 10 strokes on slurry before taping it.