QUOTE="njhmusicman, post: 11060587, member: 735985"]This is a interesting setup. What got you to try this and why the thinner gauge in the main and the thicker in the crosses?[/QUOTE]
Long story, really, really short ... After lots of trial and error, with Firewire in the mains I figured out I needed a low power string in the crosses in my Pure Storm to keep the ball in the court. A full bed in this frame was too much in Pure Storm and Pure Control sticks and for my swing dynamics. The initial run was with Firewire and a 16g nylon string. My thinking was the thinner, sharp Firewire would bite the ball better with a thicker string pushing that edge up higher off the string bed. Plus, I wanted/needed a thicker string to reduce power so I could take what feels like a natural swing for me.
After one set the FW roughed up the nylon enough that strings didn't glide easily back into place. It did make things slightly better performance-wise for me on the court. With soft multi, Sgut and nylon for a cross string, the edge 'bites' into the softer material hampering both the exposing that sharp edge and string movement during play.
Just before Christmas I found Prince XC 15g yellow reels on sale for $56 online. I bought one and should have got three since there are selling now between $130 and $180. Reviews said it was low powered, but what got my attention was the super slick coating, which I thought would, and do, help the mains snap back faster thus increasing spin. I had proved this theory only days earlier using Tier One's Strike Force RIP in the crosses. It is a slick poly like XC, except it was overpowered for my sticks. In a lower power or softer racquet, FW 18g /RIP 16g combo would be dynamite combination.
What I noticed is when I straighten the XC cross string with tension on it while stringing, the Firewire mains adjust so that one flat edge rests on the stiff, round cross at nearly every intersection pushing the sharp edge up on the racquet face - does that make sense? Now, just about any slice shot I hit - drop, serve, FH, BH - I can put some seriously nasty, nasty spin on it. I play in two different doubles clubs. I overhear guys warn their partner, who may not haven't faced me before, to watch out because I hit with "massive" spin ... lol
FWIW, my current go-to set up is FW(18g, 58#)/XC(15g, 55#).