Certain statements in the article "Electronics in, hydraulics out" (May 2005, page 22) may have led to misperceptions on the part of readers. Electromechanical systems, such as DC servomotor linear actuators, with thrust ratings as high as 60,000 lbs, are available from several web-guide system suppliers as well as the supplier referenced in the article. Color line guide sensors from several suppliers, as well as the supplier referenced, are capable of detecting pastels on various substrates.