I'm ready to pull the trigger on my first Shiro but having trouble deciding on which model. I have decided I want black g10 scales but not decided on an F3 or Hati. The models I'm looking at are F3 with Elmax and Hati with M390. I see from prior posts that some folks prefer washers and others bearings. Can anyone provide some firsthand experiences with both models that might help with my decision? Thanks.