I haven't tried it with the TLD stuff. I've been wearing it all last season with an Alpinestars Bionic 2 Jacket, a Thor jersey over it all, and the Thor SM pants. The moto gear is the way to go with the Leatt brace IMO.
its not the only one out there anymore. check out EVS new one. looks pretty good. little more streamlined and looks like it doesnt go so far down the chest and back. might fit better with thick leathers on. 3 different sizes. different colors and its cheaper too
I use my Leatt for dirt track, mx and sm. I won't ride/practice without it. It fits good with my dirt track leathers. I cut a slit in the back of my EVS ballistic jersey so it fits correctly when I ride mx. Expensive? Yes. Worth it? Absolutely!!!
05 crf450r http://sponsorhouse.loopd.com/Members/higgins/Home.aspx