Trick

[gdhampton7]

I was able to register both my thumbs and both my index fingers... And still have a spare set of fingers to register... Use the first 5 for one finger and the other 5 for the other...

 

[lostsoul2]

I always wondered if that would work but since I was having issues unlocking even with 2 sets of 10 of the same finger I gave up. haha