Well we took em both out today (My Pro has been flawless from day 1) and we took everyones advise to equalize the lines. Took em off the handles and kite and found the lines to be 1,2,and 5 inches longer than the shortest. So we took out all the knots, and put them all 4 equal. Put it back together and it flies 100% better! I knew about the line equalizing, but wasnt sure if the Blast was different from the Pro-B. It took care of all the problems we had, and now we both happily buzz around the sky together. Thanks so much for the advise! Also, he has Spectra lines, not decron (or what ever its called)