Got the scraper home. Unit is in nice condition. Was a rental at a Bobcat dealer and doesn't appear to have much time on it.
These units have two cutting edges for each direction of travel. The edge used while traveling forward is rigid. The rear edge swings back while traveling forward. When traveling in reverse the rear edge swings down to stops.
There are adjustable skid skis on each side designed to provide depth control. These are basically 1/2" steel plates with 3 slots per ski. You can adjust them so the cutting edges do not contact the surface all the way up until the cutting edges hang below a few inches. I found the skiis for the most part to be of no use. The unit weighs 665lbs and once the cutting edge begins digging the skiis sink as if they are not there. I will either weld a set of feet on the existing skiis or have another pair made with a decent size foot.
If you use the attachment like most attachments, i.e. boom in float and use bucket curl to control depth, the sides of the box are up in the air so you basically have only a cutting edge working. With the boom in float and the scraper tilted level it will immediately sink and stop the TC.
I will post more as I make modifications and get more time with it.
dsb