I should note that the logic test is required because of the accumulated penalties, rather than because of the roll.  There's still usually a logic test to get mechanicus implants, but you could always try and get cybernetics from someone who doesn't expect you to show a complete lack of emotion later.  (Much of the expense and difficulty of getting cybernetics comes from the fact that you're participating in a holy rite of the machine god, and need the approval of the tech-cult.)