Neil,
Here are a few pics of the front quickjacks on our EM which are functional. The stainless sleeves are not installed in these photos but they slide right over the 9/16" bolts that we use for the supports. They work great and can be used with a normal floor jack if you so desire. The rear ones are also functional, but I don't have any pics of them handy at the moment. Of course, the rear of the car is high enough where I can just jack up on the center section of the 9" housing...
http://www.pbase.com/mjb2/quickjacks
Mike