The adaptations I have made in this work are quite subtle to the audience but make a big difference to the performers. We are all familiar with the 16th note scale passages in the finale. These are left unchanged. However, there are other more demanding string passages in the finale that I have adapted for less proficient string students. These parts are meant to be performed right along with the originals if you prefer but can also take the place of the original parts.
Click HERE for some examples.
Frank Lestina 
Don’t forget to check on this example. No link