I've finally got my TI honed as sharp as my Dovo. Unfortunately, it only holds for about 4-5 passes on my face. Then I can feel it begin to drag a little. I finished my shave, but felt some burn. It was very sharp for a brief time though! :-) My procedure:

1. Pyramid scheme on the 4/8k norton. Actually, I deviated pretty heavily from the pyramid and went back and forth for some time with more or less passes.
2. Take about 50 passes on a clean linen strop. This seems to work well for me for both razors (my TI and my Dovo), skipping this step results in a pretty dragging razor.
3. Take about 50 passes on a clean leather strop.

Why is it losing its edge? What can I do to fix it?

Thanks!
Eric