I did this modification to help stabilize the TM. My wife is motion sensitive and the jiggling of the trailer bothered her. I got this:
http://www.ultra-fab.com/new_detail....gnum=48-979007
Got it from Amazon:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
The package I got came with hardware for six stabilizers. I only used two. Most of my issue is front to back rocking, so I only used them in that direction (so far). I used one on the front left, and I had to modify a bit to get around the spare tire carrier. It came with a piece that was supposed to mount vertically, but I mounted it sideways so I could get around the part of the spare tire carrier that was coming out the side. On the front right I couldn't use it at all because of the spare tire carrier. On the rear left I couldn't use it because of the gray and black water drains, so I put one on the right rear. They came with self-tapping bolts, which I used to make threads and then backed them out and screwed the adapter for the struts.
They have definitely helped. Other posts have talked about re-positioning of the stabilizers and that seems like a great idea too, but this seemed easier for my level of mechanical ability.
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TM: 2007 2720 (QB) TV: 2010 Toyota Highlander Hybrid
Hopkins INSIGHT brake controller, Andersen No-Sway WDH
CARCHET Solar Powered TMPS
Dometic CRX-1110 AC/DC Compressor Fridge, 200 W Solar