The vet said that what he's seeing is only part of the equation and I really need to let my trainer ride and evaluate him. She is very knowledgeable and the vet called her last night and discussed it with her. I spoke with her again this morning as she is on her way back into town and she said she will support and help me with whatever decision I want to make.
However, she is pretty clear after speaking with the vet that keeping him is probably not a great option as I am looking for something to grow and learn with in dressage. Neither think he will hold out, but her evaluation will be the make or break.
She is pushing for me to do a half lease on one of the barn geldings I've done a lesson on. She thought I did well with him. He's 18 and 15hh, but just a bit too forward for her kid students. I enjoyed riding him, but he feels almost too small for me and I felt no connection to him at all. I texted the girl offering her gelding for lease several times, but she's never even responded. So I'm really torn right now. :-/