I own the F9 E. I noticed that the stylus or rather the cantilever is fastened or centered with the so called 'tension wire'. There is no way any re-tipper can do anything about the suspension involved. A new cantilever can only be put in the (cut) old cantilever and glued together. This of course also apply for ruby, boron or whatever other cantilever/stylus combo. Much cheaper and much more wise is to get any replacement stylus.
