Right now, I am toying with the idea of changing racquets from my Diablo Tour 93 to a steel racquet I got for cheap at a used sports equipment store. Now, I like my Diablo, but I had been contemplating using the steel racquet (Bancroft "Aries," I have been led to believe.. there is no info on the web about it) for quite some time. I was deterred when I discovered that my serve and the Bancroft's flexibility didn't mix, but that has since changed. However, I don't really need advice about this... unless someone has some RDC stats regarding the Aries, because I'd love to know that. My real question was brought about by all this: What effect does stiffness have? I have always heard stiffer racquets are more powerful, but does a flexible racquet have a distinct advantage as well? I know that they are in theory at least more arm friendly, but is there a PLAYING advantage?