I've read the Grand Experiment (well worth reading, by the way). And did some experimenting based on BigSpendur's results.

What I find works for me kind of depends on the razor. My Dovo gets maximum benefit around 60 strokes linen and 60 strokes leather while my Wapienica seems to get maximum benefit from 45 strokes linen/leather.

As for draw, I get a strong draw on my Dovo full hollow and slight draw on my Wapienica half hollow (on the same strop). Either way, I know when I start to feel draw that I'm reaching the point of best result.