I had my throat stretched twice and the GI Dr said no more. The second one hurt afterwards and kind of scared me that he had over did it.
I believe he was expecting a phone call telling hime how wonderful he was but it only helped a little if at all. If it hasn't helped after two I doubt a 3d will be any help and can be dangerous.
I can eat OK if I'm careful and use white sauce, sour cream etc, very slowly but still get stuff stuck once in awhile.

Wish I could be more help Dave