I live in a super small town with an equally small number of tennis players. Sometimes -- in order to play -- I hit with older folks who hit with no pace. On a lark -- while playing against slower pace -- I switched from my lead-loaded RD7 to a light tweener (Head I Rad MP). I found that, in some ways, it was easier to use the I Rad against slower pace. I found it harder to make a soft reply with my RD7, that is, I found it harder to hit the ball slow enough for my opponent. So my question amounts to this: does anyone ever switch frames because of external factors? Why? Why not? Have you ever noticed that certain racquets are good for certain conditions, surfaces, opponents . . . or, is changing frames ALWAYS bad policy!