it would be better to have 16 or 17g mains with 17L crosses...spin potential is so much better. Having thick crosses inhibits the snapback movement of the mains because there is more surface area on the crosses that the mains need to slide across. Thinner crosses is definitely better.I've actually recently tried 17L mains with a 16G cross. Both textured polys. Found the 16g to inhibit snap back and string movement and the mains have already cut into the crosses. While it helps keep the launch angle low and very spinny for the first 2 days, I found it to be very boardy after that.