Revert "Lock trackers for security"

This reverts commit 78cbbe4be88a6d7fc78ef573b21de253fa23a1a9.
Revert "Fix unit tests"

This reverts commit 32426d4efa1eaa82e346df63e92a1c24e92c476b.
Revert "Add some extra tests"

This reverts commit 1a4b6ca4f9e3c1ccc70b2c790c3e994d36013929.
Revert "Add ability to lock plotters"

This reverts commit e5d8d6dc36f2774f9261b7a4600d1caa787b8f8c.