Borgeson or Firm Feel steering?
I am often surprised to hear that guys haven't heard that the Borgeson unit can be bought and installed without cutting the column. Where have you been? It has been at least 10 years that the universal coupler has been available. Peter Bergman, a sponsor of this site, sells a complete kit with the coupler included. This makes the Borgeson unit a total bolt in deal, reversible if you ever want to use the steering box somewhere else.
No matter what they do, Firm Feel will always have that free play in the middle of travel. This is a design feature/defect of the factory unit and no parts swapping or machining can overcome it. The Borgeson is an improved design. No slop and the ratio is better.