I recently bought my Dunlop 4D 300 racket that came strung with synthetic gut likely at 55lbs. Played with it for a good 10 hours before i decided to change since it lacked feel but overall i was hilting good to my surprise. Decided to change to Alu spin strung at 55 lbs and uh-oh right away did not enjoy at all the feel. I hardly noticed much difference to my shots .. maybe a tad more spin. But when i go for shots, they sail long. im adjusting my strokes and forcing to hold back and brushing up more. So far i have played with it for about 5 hours. what you guys think ?