I don't have any direct advice... except to suggest you try another forum that I frequent.
The "CommieCam" users group is a bunch of people (including myself) who are cinematographers using Russian motion picture cameras... mostly 35mm Konvas and Kinor cameras, and the LOMO cine lenses. There are
several people in that group who do time-lapse photography (some really great stuff), and know all about various time-lapse heads and rigs.
It's a small group, good people, very friendly and helpful. I bet if you pose your question there you will get a number of good responses.
You can find them at konvas.org
T2
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Todd Terry
Creative Director
Fantastic Plastic Entertainment, Inc.
fantasticplastic.com