Revert "Merge pull request #20 from romracer/cm-11.0"

This reverts commit dd5e8a50a68058b68ae60b78ad4b39a2540aae76, reversing
changes made to 5c9bb422f9982a8ffe87e57cb11d8448e390c649.
Revert "Add hammerhead props"

This reverts commit 5c9bb422f9982a8ffe87e57cb11d8448e390c649.