The yellow seat front has completely separated from the black seat back, plus a couple of cracks in the seat itself. Previous owner tried to reglue it, but didn't hold. Anyway, how or why it has failed doesn't really matter to me. Either way, I need to replace it. The local Deere dealer has them priced at $115, not sure which after market unit would be comparable. Probably just get the Deere and call it good.
On another note, got out and played with the 4300 for the first time today. So far, I am liking what I see.
Thanks for the responses.
mfl61