Making wrapper classes is a major undertaking. Even if you do, the our recorder will not recognize your custom wrapper classes. It can only use those created by Telerik and added to Test Studio by our developers.
Usually you'll be better off using our DOM Explorer
finding container elements and then working with the properties of those container elements. If you have a specific example of a specific control you want to share with me that you need assistance automating I'll be glad to take a look at it and see what we can do. I would need to be able to view the entire HTML, as shown in our DOM Explorer, to see what we have to work with to accomplish your automation needs.