I have a 36" and 48" metro and when i bought it from the dealer the blade spacers were 2 above and 2 below but it was cutting way too low. So now i have 3 above and 1 below but it is still cutting some yards too low. It seems like the deck on the 48 srapes on the grass and scalps it alot. when i measure the blade off the ground i get it says like 3 1/8". I was wondering if i could raise the deck up so it doesnt scrape so much. I want to be cutting at like 3.5 - 3.75 because that seems like what most guys around here are cutting.