I'm surprised by the number of entries received this time (22!). All the solutions were spectacular, though you should exceptionally check out sendai45's and mi2's revert mechanism at the end of the tunnel. All four ways through the center were used, though the most favourable was the downmost tunnel.
Votart Silak, $8798 as you can see, the dillo touches the plate before the falling plate does, so it's a valid solution
Votart Silak, $8862
Votart's 8800 light was disqualified, because an object touched the metal plate at the end (even if it doesn't interfere with the plate's ballance, no contact is allowed)
Congratulations!