I added the BAL crank downs as well, they work great. Atwood has ratchet stabilizers as well. I had them on my old Coleman the only problem with these are they never seem to set where you need them.
[img width=218 height=252]http://www.rvadenver.com/atwood%20stabilizer%20jack.jpg[/img]
You can also go the cheap route and get some of these:
[img width=200 height=180]http://www.rvtruckparts.com/Image/31529.jpg[/img]
Amazon.com you can buy them at reasonable price. The scissor jacks work good… but remember they are only for stabilizing. Even if they are rated to lift more wt. than your PUP is, it could twist the frame if all the weight is on the corners… then door or roof may not install or close properly.