Hi all. I'm thinking about ordering a Shavemac flat top. I already have a couple of Shavemacs and really like the silvertip for its softness. I'm trying to get some input with regard to the DO1 and the DO1 2-band. Am I correct in thinking that the DO1 is just a fuller i.e. firmer brush? What is the difference between the DO1 and 2-band DO1? Any particular considerations with regard to the fact that it's going to be a flat top? Thanks.