When you say 'odd', can you be more specific? If you think they aren't parallel, then I would suggest that is purely down the the terrain. They look fine to me.

When you say 'odd', can you be more specific? If you think they aren't parallel, then I would suggest that is purely down the the terrain. They look fine to me. Have a look at the clavius moon base site [1] for much better informed discussion of any issues your friend may have. [1] - http://clavius.org/ http://clavius.org/