I have a new Spartan 61” deck. So far it has not been cutting the greatest. I have tried to level the deck. When leveling, is it better to get side to side dead on or is it better to get left side blade when at the front the same as the right? I ask because I cannot get both on at the same time. If I get the side to side dead on, I’m off 1/4” when comparing left blade at front to right blade at front of the deck. I can get the measurement when both blades are at the front close, but then side to side is off 3/16” or so. Thoughts?