I am new the business and just purchased a used MTD PRO 1652 Hydro walk behind. My question is the mower is cutting way to high and we want to lower it to get a good alround cutting height but have now idea what we need to do. I know the spindles has one spacer on top and the back deck is set to the bottom holes making it as high as it will go(there is only two sets of holes for the back of the deck high or low) And the blades have the spacers all set to the lowest blade height. What do I need to do???