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Osterizer blenders tended towards heavy construction and motors. While this raised cost, many early-model Osterizers still function today, and are more powerful than a majority of contemporary consumer blenders. [citation needed]
Some administrators use a series of colored pencils, in order to preserve a record of the order in which design elements were reproduced. However, because of concerns that the use of color changes the nature of the test and makes it easier for the subject to remember the figure, the current test manual suggests that this should not be done.