I can't play the grace notes. Either it gets out of sync or there is a noticeable delay.
Fx-G#-A#. That works best for my hand, and it's also the fingering used by the following performers (whose hands are visible):
(Helpful tip: on YouTube, you can use
. to move frame by frame.)
Tensing up when playing fast is a frequent problem. You might be tightening your hand to play the grace notes, or tightening your upper arm to move quickly to the high
Play slowly. Play the first three notes, releasing the
A# with a staccato "leap" to the high
D#. Your movement should make a single, smooth arc (a parabola). If you find yourself adjusting your arm position in mid-air, or if you need to adjust your finger position as you approach the
D#, then your direction of movement is not yet efficient enough to make the leap at speed.
When you movements draw a smooth curve, then slowly speed up.