Note though that when you use Anchor Sentinels the chunk loader loads all chunks in direct line to the anchor. not 3x3 anymore:
Default Anchor (A: Anchor, X:Loaded chunks, U: Unloaded chunks)
UUUUU
UXXXU
UXAXU
UXXXU
UUUUU
With Sentinel (A: Anchor, X:Loaded chunks, U: Unloaded chunks, S...