I have three of these now and note the newer ones has a different gear size than the older one I have. I love the chuck but really want to have only one key. Has anyone had any luck changing the gears in an older one to allow the new key to work it? Counting the teeth in the key I discovered that the new one has 12 teeth and the old one had 11? Can only assume that Oneway has had to change to save a few bucks on each chuck.