Hi,
First off I have tried Black Widow 16G in a Asian K6.1 tour, its feels actually for me, too soft, I strung my racket at 52lbs,it lasted about 4 weeks before snapping in the mains, I got decent spin,and depth, no arm issues, I got my friend to try this in his Dunlop Aerogel 200 (Non 4D) and he came to the same conclusion, abit too soft for his liking, strung at 55lbs, he said next time he would try 57-58lbs. Worth a demo.