I'm replacing the stock bleeder screws on my two bikes with speed bleeders. When I looked at the M109R, I noticed that it had two bleeder screws on the single rear caliper. Why? I've never had another bike, car or truck that had two bleeder screws on a single caliper. Of course I've had bikes with two calipers on a wheel and each one had a bleeder screw, but never two on one caliper since there is only one fluid line feeding the caliper. Anybody know why? I checked the other threads in this forum but didn't see an explanation. Thanks.