The only time I remember calculating X-wind component was on a trip to Inishmore where it was blowing a gale (as usual I guess). I had made a decision/agreement with my Ops Department (aka wife) that we would not attempt the landing with more than 20knots cross wind. I found it a very useful process to help keep the landing decision objective. I also managed to land the Bonanza in about 150 m - just past the turnoff (my shortest ever Bonanza landing).