Hehe. Yea. You can probably still do that. Step 1: change to style with ledges (for instance: the firebog styles). Step 2: place cubis on ledge. Step 3: change to other style. No gravity. Cubis float.
Using the ledges would also work, but you'd be limited to placing them only where the ledges are (or where). On the other hand, there are probably looks you can only get using a ledge. I'll have to try that, too!