4 link bottom bars brace system

Is anyone familiar of the new style brace setup for the bottom 4 link bars that does away with the wishbone?

May not be that new.

https://www.dragzine.com/features/pri-coverage/pri-2012-r2b2-race-cars-x-link-four-link-locator/

From the picture it looks like it would bind the lower bars in roll rotation. Am I missing something?
Doug

Isn:t the center a slip joint

Many of the dragster builders have been using a lower X link on the four link for years and years. There are a few variations on the same principle. Also seem to recall someone advertising an X link 4 link lower in the back of National Dragster way way back.

Is R2B2 even around anymore?

I believe they are no longer in business but a chassis shop in Sac fabs them.