Just a note: The CD-19 and CD-22 should have identical transoms, so any arrangement suitable for either one should fit on the other, and vis-a-vis, etc.
What can make things difficult is the presence of 1. Twin motors, (or) 2. Kicker engine (without or with an auxiliary bracket), (and) 3. Trim Tabs.
Some of the above features singly or in combination, can make the addition of a swim step a truly custom fitting operation with close tolerances/clearances. :smileo
Be sure anything you order can be returned if it doesn't fit!