More surfacing curve options#1587

I would really like to have a few more surfacing configurations than the current right hand circle. The easiest option would probably be to use the existing surfacing points with the drill arriving from the opposite end, creating a left turn rather than a right. You could presumably reuse the existing animations etc for this, just mirrored. Uncurved locations would be even better but, I assume, would be a little more difficult.

Mostly I really like symmetry. While the current game creates interesting build options by always curving in the same direction, I would like to feel like there is some benefit to building symmetrically.

I also like symetry