The Fender Stratocaster deserves to stay in tune while you are playing also. To improve the strat staying in tune, you need to install a String Lock in front of the nut which clamps all the strings to each other ( shown in the picture on the left ) preventing the strings from mooving microscopically at the nut thus improving staying in tune while playing.

 

However you must install a Fine Tuner ( shown in the picture on the right ) at the bridge saddles in order to tune your Strat. when the temperaature and humidity changes. The prototypes are made and working. Working capitol for the Die Cast Tooling for the Strat Fine Tuner is needed at this time.