Calibrated the fridge more carefully.

Change-Id: I6b51b6c1f9a6762597551e36f626d81606e02666
diff --git a/frc971/control_loops/python/elevator.py b/frc971/control_loops/python/elevator.py
index eb3f20c..fba72c8 100755
--- a/frc971/control_loops/python/elevator.py
+++ b/frc971/control_loops/python/elevator.py
@@ -41,7 +41,7 @@
     self.dt = 0.005
 
     # Elevator left/right spring constant (N/m)
-    self.spring = 3000.0
+    self.spring = 800.0
 
     # State is [average position, average velocity,
     #           position difference/2, velocity difference/2]