I suggest trying it. I like it better than poly in the mains. Better control and more spin potential IMO. My hitting partner strung a handful of his sticks with poly/multi and poly/gut combos to compare against my preferred setup of multi/poly. We both preferred the poly in the crosses. A little better feel, more control and more spin. I wonder how well a poly mains slides against multi crosses. Some of these multis feel like they have a rubberized outer coating that must inhibit the movement of a main string - even a slippery poly. Seems like going the other way with the slippery string on the crosses would free up the mains to slide back and forth much more easily to provide additional spin. Certainly much more than a full bed of a multi and I would assume a poly/multi hybrid bed too.