What model year is your 22? If 1972-78, why change to a kick-up rudder? The standard fixed rudder doesn't go deeper than the keel and so a kick-up rudder seems pointless and just adds complication. For the 1979-83 models, a kick-up rudder does kind of seem beneficial, why O'DAY kept the fixed-depth rudder on the 22 when they changed to the K/CB design seems strange to me. I'd start looking at what other similar-size boats have for kick-up rudders and try to design and build one that best suits the O'DAY 22 transom and underbody. I have pictures of the optional kick-up rudder for the O'DAY 20, that may be a good place to start.