For those of us maybe a bit challenged by the very close in handwork needed to do this kind of fast 16th note work, here's a little tip...

Try splitting your keyboard, and then putting the same sound on both sides. Transpose the lower section up a couple of octaves or so, until in exactly the same range as the RH section. Now you can play comfortably with both hands well apart, but it SOUNDS like they are right on top of each other..!

It's really good for nylon guitar classical stuff like this, but can also be a boon for doing accurate banjo and mandolin work, amongst many others. Not to mention xylophone, marimba, steel drums, and even full kit (so LH/RH repeated notes don't tangle your hands).

Another little tip is to perhaps have the LH sound edited to be just a hair 'darker' or less dynamic than the right (to emulate how downstrokes sound a bit different to upstrokes) and you can even vary the tuning a hair on the RH side - perhaps a custom scale with tiny random sharp amounts to emulate how more force pitches the string up a tad.

Lots of fun to be had, without tangling your fingers!

very nice left hand work