After reading the manual which I found on Freedom Scientific's site as reference, I looked at the Retina / camera lens unit and I think there is something missing. According to the manual, the camera should have wheels on it to roll across the page. I don't find any wheels on this unit. I removed the lens from the cable as instructed and her is what I find... A long metal object with a slider on top which has three markings on the right side. On the bottom side theres a recessed portion at the tip then a raise portion longer than the recessed which has a square hole towards the tip directly under the slider, a rough area then two rectangular holes towards the cable connection. The area with the holes has a ridge on either side which has a lip or recess within as if it will hold something. I feel no wheels at all. Am I missing something here? Vince Mistretta Cellular - 561-234-7631 Skype - vin5451 To unsubscribe at any time, just send a message to: optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in the message subject. Tell your friends about the list. They can subscribe by sending a message to: optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes) in the message subject.