Originally Posted by sureshs
With a SW grip, won't your palm be face down by itself?
Regardless of your grip, you can still move your hand just the same. What Nii says is that you have to turn your palm face down with relatively neutral wrist position at the end of your take back, just prior to your forward acceleration. The more conservative your grip is, the less closed your string bed will be at that point, but the important part is to turn your forearm as if you'd lay your hand on a table, palm down.
That's why Nii says 'elbow pronation' and doesn't write a whole paragraph. For those who wonder, 'elbow' stands here because you can also pronate and supinate at your ankle... all this locution means is turn your hand palm down.'