I'm in the same boat. I think you can do the first circle, then hit the jump, do a figure 8 (half the bottom, then the full top, then half the bottom again) and drop onto the conveyor belt, but skip over the jump by grabbing the next circle. I can do this sometimes, but always miss at least one star and even then, can only get about 14 seconds. I can't think of another way to speed things up!
I can confirm that the latest update changed the 3-star time to 16 seconds. It also erased my previously earned 3 stars from a different Rush level, but
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