We can't see your thumb, so we're all assuming it's all the way in its hole. If that's the case, yes the spans are way too long. The gripping edge of each finger should be half way between the first and second joint. I would mark this point with a pen and show him where the spans should hit. He should fix it by plugging the thumb and redrilling. However, I would make him use a slug, it's best not to have the thumb contacting the junction of the plug and the ball. -- JohnP