I was concerned about the 7 second delay when reversing declination in guide rate. After a lot of head scratching, I came to the conclusion the Anti-Backlash does not work when in guide rate. If you rest your finger on the slow motion control and apply a reverse in dec direction, you should feel the snatch as the backlash slack is taken up. There is no take up. It works fine in speed two. I consulted someone far more knowledgeable than I in the nature of firmware programming. He has taken a look at the code and has come to the same conclusion. Dec reversing does NOT apply any anti-backlash when in Guide rate. This affects every LX600 which has been released or is about to be released. If you are lucky enough to have no slack in your dec gear train, this wont affect you at all (for now). Unfortunately, I suspect almost all DEC gear trains will have a fairly significant amount of slack in the gear train. Anti-Backlash is supposed to deal with this problem (that's why it's there). Sadly, it does not apply any anti-backlash at all. This means pretty much all of us. Dec guiding with Starlock is hopeless and will never work if it has to deal with such an enormous amount of slack in the gear train. Do your own tests. How many seconds does it take for DEC to reverse in guide rate?? Try putting your finger lightly on the DEC slow motion knob and reverse the DEC direction. You should feel a judder as the gear train rotates in fast speed to take up the gear slack. Try it in speed two and you will feel this in operation. We desperately need to make Meade aware of this so they can work on a firmware update.
Until a fix is made, I suggest you switch off Starlock and use a good polar alignment instead.