I have two of the new Universal delay drilling tools, and the drill bit is 1/16" longer on one than on the other. Measuring from the base of the knob, one is 2 1/8" and the other is 2 3/16". Since 1/32" is one second difference in the delay, that's a 2 second variance in these two tools. Anybody know what the correct length of the drill bit should be? I can see where there is a set screw in the knob, so it should be easy to adjust, I just don't know what the correct length is.