I've never had any trouble with Exmark Ultra Cuts missing grass with notched high lifts. Could you have play in a spindle? grass build up? belt slipping? How high are you cutting? Mine will miss grass with gator type blades because of the decreased lift. Have you hit anything that would make the spindles out of line?
Exmark Lazer Z X series
Scag Turf Tigers W/Briggs Vanguards Velocity decks,
My friend Mark says: "The secret to a good cut is never looking back!" .