While processing the 20050306 inclinometry data it was felt that the raw LX (data Channel 4) values have increased. The plots below show the behaviour of LX and RX so far this year:

There's certainly more spread in the LX values than in RX, but I'm offering no explanation of why the left beam (between the left antenna wheel units), should be rotating (?) on such a timescale while the right beam does not. The equivalent LY and RY plots are shown below for comparison:

. . and reveal a recent zero-point shift in LY of about 400mV. These effects could be real twitches in the structure, or they're instrumental.
NB : 400mV = 20 arcseconds = 0.5mm leverage over 5m.