For those that use these what sort of felt are you using? I've seen the discussion of Martell's and would've probably just bought one of those but he's out of stock. What do people use who go the DIY route use these days? I'm looking at grabbing a sheet of the following based on some razor forums. http://durofelt.com/image_21.html I've looked at Martells and Marko's but they're both out. Input welcome!