That's pretty neat!!! I wonder if the 'flex equalizer' makes that much of a difference in the way the suspension works?
I 'updated' my trailer suspension to Dexters Heavy-Duty suspension kit, which, includes brass bushings (instead of the plastic ones 'junk') & greaseable suspension parts. It seems to have tightened up the suspension.
One of the signs of bad plastic bushings is a 'popping sound' when going over bumps like at the end of the driveway. Mine did that & I thought it was the hitch/ball making the noise. No more 'popping' since the HD suspension install.
Joe F. (Buffalo)