In this blog post, I will try to explain the changes I made to the multistar code to address the issues I discussed in Part 2. A change of Focus The flagging code in the official version of Multistar guiding is focused on keeping the secondary star deviations close to zero. This sounds good!…but it completely ignores what the primary star is witnessing. The primary star may be showing that a significant guiding error is occurring, but the secondary stars are being flagged and ignored simply because they agree with…