This will help, I am sure about it!
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I want to clear a dilemna with "WristmallV3" part. Some of the builders might think during it's assembly to "WristlargeV3" that there is an error, because the fingers can go more further in open position than in closed one. This is because you need to fix the "topsurface". Once attached the fingers won't open too much.
Also the closing really shouldn't be too much, because once the finger tips are glued, you will get ringfinger stucked by majeure finger on full closing.If, after the complete assembly of those parts, it doesn't close enough to your taste, cut a little bit with a knife the blocks inside the palm, that stop the closing.
Ringfinger should have a movement of about 15 degree and Littlefinger of about 20 degree while Thumb will normally have a 50 degree movement.