I have a 2004 Exmark Lazer Z. Model no. LZ27KC524, Serial no. 454495. I am trying to: 1) Locate the correct spindle replacement. The owner's manual says the OEM is 103-3200, whereas I've seen websites that say this is for the 60" deck, not my 52". What is the correct OEM number? 2) Find out if anyone has replaced their own spindles? Any problems, tricks or tips?