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Has anyone tried Main Builds » 100D / Rebel SL1 1.0.1 on a Rebel SL2/100D?

I apologize if this is a duplicate - my message disappeared earlier today, while I was typing.

I have made three attempts to create star trails, using the ML intervalometer, with a Canon 7D, always ending up with great gaps in the light streams, no matter how short the inverval. Even with the ML 0 seconds "like crazy" setting, I get great gaps. I see such beautiful photos of this type online and I would like to achieve something near the quality I see here and other sites. For post processing, I used StarStax in gap-filling mode, but it doesn't seem to matter how I adjust the overlay/amount. For now, all I am interested in is the technique - composition/creativity, I can tackle later.
I have used the settings below, all with pretty much the same results.

ISO:      400     800   100   
Aperture:   f4   f4   f4   (largest for the EF 24-105)
Time:      30s   30s   30s
Focus:       M   M   M
Interval:   0s   0s   1s

I wasn't able to embed my example, but here is the URL:
https://photos.google.com/share/AF1QipMdbtmALguPejCX4CHasRVQeyRl6Tw_JTHH6KQ_2IdejDPHl9OyQG_NHM1dcpwsFw/photo/AF1QipP3QI6X1KNFVtoYaSflLYxiJGxJQdM-7EMRczCZ?key=QWV4Q2RGdXhmbExfWW1uc29qaU9TNk0zNTJJQ2ZB

Any suggestions would be greatly appreciated.