basically yes, you can't be exactly 9 and 3, or they will hit when they go 180.

Basically, if we look at the circle in degrees, and quarter it off, you have 0 at the top, 90 on the right, 180 at the bottom,270 at the left, and 360 / 0 again at the top. You will want to start with the linkages at about 80 and 260 so that when they rotate through they are at 80 and 260 again without hitting each other.
I guess on a clock that would be at about 13 minutes and 43 minutes.

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