Finally have been able to upload « thumb5 » and « leftthumb5 » on thingiverse.
By the way, I made a modification on « bolt_entretoise1 » to « bolt_entretoise2 » because the previous version had oversized bolts in length, I expected people to just cut them. But seeing pictures from the builders, I realized it confused somehow their assembly. I also added a fastening ring for the bolt that goes in the wrist.