I took #51554704028341371 - do something with this and fixed the second zip by just adding a couple of frames of left input before the last slide.
Uploaded movie file if anyone interested. Synced up to 3370th frame. Ignore the framecount. Route changes: slashing air to remove double 0 speed frames different zipping (10 frames instead of 14 frames), looks still improvable for both positioning and zipping input length minimally different post zip test