Peter,
Please see my thread below on the setting of SuperTigre carbs. It's pretty much the same for all of them.
As far as your engine's concerned, the high compression's a good thing. You can probably start your engine by flicking it against compression. On some of the S3250's, we've just applied some backwards pressure against compression and released the prop. Starts quickly at idle.
If the engine tends to run backwards, either flip it backwards, or see if it's flooded. A flooded engine, or even overly-rich one, will tend to start and run backwards.
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