My friend told me if I buy 24x CDR disc, I can only burn in 24x burner, 16x CDR disc for 16x burner, is that true? He suggested buy 1x to 24x CDR, then I can use any 24x in between burner. I always think as long as my burner x is highter then the disc x, then I can use them. Can someone comform that? Thanks.