1) After indexing the telescope position the probability of getting an overly large "step size" introduced on the next paddle step seems higher than with version 3.2 noticed 2/2/06 2) Some care must be exercised when focusing the camera and getting the centroid. You may get a 1 pixel shift from a slightly misfocused spot. The shift will be larger if there is an asymetric aperture stop like the exit pipe aperture stops. Also, you should use a reasonable size box for calculating the centroid so that background light does not corrupt the calculation. - I like a box whose side is 2 or 3 times the diameter of the light spot. 3) The user must set the slider motor velocity anytime the motor has been powered down or hit a hard limit. 4) We have noticed a problem with the new system in yawing the LD carts. Here is the experiment: ...... Move both LD carts to some position. ...... Put in the slider mirror in D1 position. ...... Align the camera mirror to the exit mirror LED ...... Align the exit/LD1 Yaw motors to position the corner LED ...... Turn off the exit mirror led and turn on the corner mirror led. ...... Adjust yaw of LD1 to center nominal location indicated on guide. ...... Repeat this for LD 2 after putting the slider in the D2 position. ...... Now, go back to LD 1 and check the yaw, .......... it is now off to the left by nearly 20 pixels. ***** The workaround is to yaw LD2 first then do LD1. Further tests run on 2/9 LD2 moves of 0.5 sec or shorter sometimes induce motion in LD1 LD1 motions do not affect LD2 Turning on the LD2 light is a short motion of LD2 and two clicks will probably turn on the light on LD1. The LD lights sometimes need 2 clicks to turn on and off 5) Fixes for sticky relay in CB Com units, e.g. the Acquisition camera&mirror: Rich Barry found that unplugging and replugging the power to the camera & motor corrected the problem. I usually prefer picking up the CB-Com unit (being careful of the 120V leads) and rapping it against the metal tto free the sticky relay.