Telescoping Trailer Tongue Extension Question

I want to clarify that the pictures I've shown in my initial post are just an example of the idea. The modifications I might make to my own trailer will incorporate much larger box tubing for more strength. I will also incorporate at least two pins in addition to chains or cables extending from the tongue to the trailer with tension for added stability and strength.

I appreciate everyone's input so far. I'll be taking the thoughts and suggestions in mind as I meet with a local welding shop in a week or two that specializes in trailers to see what they say and will report back.