Revert "Lock trackers for security"

This reverts commit e79ff4d9475384985517666c8f96ffc2974f5b17.
Revert "Fix unit tests"

This reverts commit 9e1baaa4f1d21249fdaa8b7d2f9645646a9efe2f.
Revert "Add some extra tests"

This reverts commit becc6a4c23f3c56f21171a52659db8ce26ce0851.
Revert "Add ability to lock plotters"

This reverts commit dce9dbe3eeccd1a31b22c0172f90ff875909ca16.