These seem like reasonable places to use past perfect. If the order of past actions is clear, the dependent clause (just as with coordinate clauses) needn't be in past perfect, and native speakers tend to prefer the simple past to the past perfect just as they prefer the simple present to a future form in the dependent clause. If there is a possibility of ambiguity in the order of events, however-- or if you wish to stress the precedence-- then past perfect is called for.
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