March 25th, 2013, 21:45
also the thumb rest plays a roll , youres has 3 screws , some manufactures have 2 screws ,. you can use the thumb rest to help you indentify what brand it is , also the hole under the la key does it go all the way through or is it counter sunk to allow clearance for the spring screw ( i would think that it does not go all the way through )