I picked up a Gravely 252z 25hp Kawasaki for 5+ residential acres I mow. I can't seem to find spindles that cross reference with OEM. #59225700 discontinued to # 69219700 It appears the middle spindle is different from the outside ones as it being taller but then a diagram shows all 3 the same part #??? Is there a deck serial number somewhere to find out if it is the correct one? Was looking at the 3 piece set for $179 instead of $140 piece.