Grade 4 capsular contracture. What is the best surgery to have if I were to have another one?

You are correct that the number one risk with surgery to correct capsular contracture is recurrence. CC recurrence can be minimized by using several surgical techniques including replacing the implant in a new pocket, changing implants, and using appropriate antibiotic/dilute betadine irrigation solution during the procedure along with postoperative massage techniques. If your implants are subglandular, they can be changed to subpectoral. If they are subpectoral, a new subpectoral pocket can be created.

There is not one best way to treat this. In general, most would try to remove the capsule as best as possible, possibly place it in a new pocket under the muscle and/or maybe add an ADM with new implants.Some surgeons might remove the implants and have you wait several months before putting new ones in.