Which would you eliminate?

[geodave]

We can put in the ice block without removing anything already, though.

But I like the turning force floor / ice corner idea. I'd go for an ice corner because it's more versitile (IMO).

You'd need four tiles for the four possible directions that it would face, however, so that kinda ruins the idea

Not necessarily. The ice block generator was added by utilizing the existing block generator tiles. I can't think of how to do it exactly, but I think it could be done.

Some of these ideas should be in the Super Tile World thread.