Skimmed through quickly but curious did you account for the traveler being mostly hollow. What if lead wasnt ment to be literal and more so a descriptor to illustrate the weight or heaviness of the other material/s. The Grimoire also mentions the moon as a size reference, could the traveler be roughly moon sized in which case the scale would be odd since we do not actually know how far off the ground the traveler is hovering. Will edit later for clarity. Nice post.