Originally Posted by MAX PLY
As Irving said, string moves if you hit with spin. Some of the roughs may move less and Recoil is a thought--you could also recommend adding string savers. You could also recommend he try a String-Thing straightener (which works just ok)--otherwise, there's always golf.
Not sure where we are going with this. Is the reason for wanting a string that does move (or has the appearance of not moving) because you want to reduce string breaking or does the customer just not want to see the crocked strings?