I have an old custom HW77, I think it's an Airmasters one, it looks like it used to have a cocking aid fitted (there are marks on the underlever) I used to have one of these but sold it ages ago with a TX200. If anyone has one or knows where I could get one that would be cool I have seen the AirArms ones, but don't like them. The old ones had a fine sharp knurling.