I have an Adcom GCD 575 that is working pretty fine.when it doesn't skip. However, it tends to skip more and more all the time.And now I can't even get through a complete song now.Someone suggested me to take the cover off and wash the laser with alcohol. After doing this, it still skips and am told that the laser i could shot.It has the Sony KSS-150A laser, which I learned replaced by the KSS-210A laser. can i complete novice do this swap?.What is associated with laser replacement? Do I need special tools?