double blades work well if u need more lift... conversly if u have adequate lift,
they can cause blowback.. . this sometimes causes the mower to miss higher blades of grass ,weed etc,as they are pushed dn,by the air hitting the top of the deck and creating a downforce as it comes back dn...
in short try it ... it works with some ...
also if u mulch leaves in fall ,doubles really are a plus in that area... on my mower,,anyway.