Good question. Which bridge do you think will be more stable --- one that has more parts of your palm and fingers on the cloth or one that has less parts of your palm and fingers on the cloth? Since the cb is traveling at a fast speed over a longer distance, accuracy is key. I think the margin of error on a shot like that is slim to none to begin with, so even with a flat hand, you still have to be deadly accurate. The way I look at it, there's really no room for an aiming mistake on this type of shot, so it's better to go with the most stable bridge you can make.