Quality post!
What about a blended tankie?
Go back in time and try to flag down Archduke Ferdinand’s motor carriage only for the driver to get freaked out and go down the alternate route right to where Gavrilo was trying to get to the original route but was running late because another time traveler delayed him…
The one where they go back in time and fuck hitler’s mom.
https://interestingengineering.com/innovation/schwerer-gustav-the-biggest-cannon-during-wwii
Took two full sets of tracks with enough space between for a third full track.
I mean how would they even do that… Women are not allowed on the men’s side!