Very handy and well done video. I didn't hear this mentioned: when you push in the piston, brake fluid will be forced backā¦more »Very handy and well done video. I didn't hear this mentioned: when you push in the piston, brake fluid will be forced back into the reservoir and will overflow if the reservoir is already full. So you should remove some fluid first. Then when you are through and you pump up the brakes be sure to refill the reservoir. « less