I use the All American Sharpener ...
https://www.allamericansharpener.com/5005?gclid=CjwKCAjw8cCGBhB6EiwAgOReyyLez3s6GuADqMLNSX5B6sk131S8NzgeB27ruYys6FlPm0wcQ0gTnBoCwAwQAvD_BwE
The first time takes a little longer to return to the proper angle but after that just a few passes and it is very...