After going back and forth between the Youtek Radical and the IG Youtek Speed 315 for the past six months, I finally decided that I liked the Speed better and ordered a backup racquet of the same model and year just in case I ever break a string or if I need to get one restrung. Since I finally had a backup, I looked at the initial stringing as an opportunity to experiment with a different string setup. I normally have the Speed strung with Wilson NXT Control at 56 pounds. When I got the backup Speed last week, I had it strung with Vokl Cyclone + Wilson Sensation at 54 pounds to see how I'd like a hybrid and also thinking I might get a bit more spin. Played with it for a couple of hours yesterday and haven't made up my mind how I feel about the hybrid string set up yet. FWIW, neither I nor the guy I played noticed any difference in the amount of spin I was getting as compared to the NXT Control setup. One thing I did notice, though, is the new Speed with the hybrid string set up feels like it's got a totally different swing weight and balance than my old one. Is this likely due to inconsistencies in production? Or do different strings have more of an effect the weight and balance than I would have expected?