One only has to read the old australian army handling notes for the souix and you will see that it is recommended to run the RPM 100 over the the red line
Interesting TET. Recall a crash comic telling the story that many of the engine failures in civil 47's in Oz were the result of overspeeding that produced valve bounce. Engine failure due to dropped valve occurred some 25 hours later. Wonder if there may have been some misunderstanding of the Army technique as a result of grapevine talk (ie using more than 100 rpm), or alternatively perhaps representative of a "she'll be right Jack".