OK last night i finally had a focus failure. it occurs about 2:01AM in the log. it appears that the HFR was miscalculated somewhere along the way, leading to a restart. at that point the stars were too big for SGP to detect any real stars; in a couple of frames it seems to want to pick up on a hot pixel or some other noise, despite the min star size being set to 4-5 (hard to tell from the slider). the first pack in the zip is the initial failure and the remaining packs have the really large stars which were not detected.