also how THE FLIP do I trigger the Tank and Scar fight? Does the reputation have to be like resentful or something? Mine's at like 80
I'm pretty sure the planks are only obtainable from Logan at the moment - or if you /can/ use the axe somewhere I haven't found where.
Did you see the two of them interact on the track? If not, check Bareshade and do more quests there - you do have to, for example, convince or discourage Logan from interacting with the camp. What have you done in Bareshade? And did you see the Tank/Scar discussion on the Track? Have you met Jester?