Leap Motion is king of finger tracking. Arm tracking - not so much - the angular translates are simply not good.

Media Pipe's hand/arm tracking is very good.

So am wanting to have:
1. iFacialMocap ARKIT/iPhone Face/head tracking.
2. Add in Arm tracking (Media Pipe seems best) - no fingers
3. Add in Finger tracking only from chest mounted Leap Motion 2.

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I tried some manual tricks, playing with blue prints, saving to disk, and reloading.

I tried disabling the Media Pipe blueprint's connections to "fingers", and for Leap Motion have it set to ONLY control fingers.

The end result is Head, face, and Arm/Hand tracking, but NO FINGER TRACKING.

This is a case where having the source code to debug this would be uber helpful.

I'm guessing that "even though I cut the lines to do Finger Tracking" that the final nodes in the Blue Print are configured to "set them all" (which means it sets the fingers to Default position -- and this overrides the Leap Motion's Finger tracking.

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If support can give me a clue/hint, that would be great. I'm spinning my wheels here.