I heard JMac talk a lot about how Luxilon strings hurt your arm. I know he says a lot of false things, but, is this correct? Because I have a FP Radical MP I want to put ALU Power Rough 17 @ 57, will this be hard on my arm, and should I soften it up a bit with something like XCel? Or will it be fine? One a side note: Does the tension 57 sound good? I am used to the power of an nCode 90 @ 55 (which isn't that small I must say), will this be similar power?