Hi silv,
when you are levelling the tripod, take the equatorial head off and put a builders level across the top of the tripod. I usually did this in three directions - pointing the level towards each leg in turn. It takes 2-3 goes on each leg getting closer every time. I wouldn't trust those bubble levels at all.
Aslo, +1 for the solar noon method. Spot on every time, and once you have marked true south out, you don't have to do it again
Adam
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