I used the Wingfield cross braces and they made a huge difference in the wiggle your talking about. I compared the costs and ease of use to JT Strongarms and the Wingfield set up. I installed in probably an hour or so and had the wife test the before and after shake, she was pleased with the results. The system stays in place and your not having to find somewhere to store the that center stand.
http://winfieldrvproducts.com/