Shave #145, the edge is still quite good. I’m a dozen beyond what Alfredo did with his vintage TI, but I am also using fabric/linen where he did not, he used Kanoyama suede and cordovan only.
This isn’t really surprising, Iwasaki said in his book chapter for barbers that use of linen would make an edge last longer than leather only, and could bring back an edge that was falling off. That’s exactly what I’ve experienced. It will be interesting to see how much further it will go, but I can tell you that the edge is seems stable and its shaving very well after adding the Latvian linen each shave.
I’ve used the Latvian linen with both roo and Kanoyama cordovan, and based on limited use, cannot tell a difference between the roo and cordovan. I can tell a difference between the Latvian linen and the Kanoyama canvas, with the linen doing better, again based on limited use.