I've only used them a few times so I don't have a ton of experience with them and I have only used them with mono and stickbaits so I have no experience using leadcore. I have found that it helps a little to keep the rod tip down slightly and to not let the board hit the water again after pulling it out when reeling in a fish. They work better when the water is calm, as the waves are usually what makes them dive for me. If the board does dive, just let the line free spool and it will come back up. I hope my small amount of experience helped you.