I was putting my 48" brass tag E0590 deck together yesterday and tried to put the "old belt" back on it and it was too long. It was 98" which is correct length but measured the width and it was 3/8 and not 1/2". Figured the deeper sheath distance would account for the difference. Went to John Deere and got the specified 1/2 inch belt. Tried to install it and it is too long as well. It has a new idler and spring, both JD parts. Seems either the idler spring is too long or the belt is wrong. I put a M41668 belt on it per PC1069. Anything I am missing here? Anyone else had this experience?