I was in a similar situation when I got my rm50c. My first 3 stock modules were a kh1, kh2' and a kh3. I send both the kh2 and the kh3 to Rob to be modded (1 as a kh23 so I can toggle between a kh2 and a kh3' the other became a mark X.). Both are awesome mods. I kept the kh1 stock, it takes...