any suggestions on adding tube to proline cgr cage?
 

Like the title says, I want to add some tubework to the plastic cgr cage and am kind of stumped on how to pull it off and still actually give it some more strength as well. Any suggestions will be mucho appreciated. Thanks

I don't think you'll be able to easily attach tubing to the cgr cage whether you use styrene or steel. You might be better off replacing it with a whole new brazed cage. Then you can add to it or modify as needed.

First any work on a plastic cage is going to only be as strong as your weakest material.

Second if you must. You can use tubing that you have tapped out to 3mm and bend and cope tubing to where you would like it. Then attach through the plastic by drilling out 3 mm hole (or slightly larger) and using 3mm screws to attach.

Best would to be... start over and build a metal cage