IMHO If your running inlines or jets or mini disks. Running the boards to close to each other can get you tangles. Besides your trying to find if the fish want the presentation close to the boat ( they are not spooking) or far away from the (very spooky). If your outside board/boards are the main one getting bit, move all the boards further away from the boat. If the inside are getting bit, bring the boards in closer. It's all about covering water, find out what/how the eye's want and then give them plenty of it.