After each test, we gave feedback to the developers to improve the fluidity of the device. In particular, because V.2 allowed the device to be linked to a server so this is something we wanted to improve. Thanks to the comments and experience of the experimenters involved in the projects, we were able to validate the usability and effectiveness of the system. We did not carry out user tests on this version because we wanted to test the coordination between the experiment assistant and training modes. Finally, depending on the user's success and errors, a subsequent training session is proposed to the user to match their needs.