Caltrac Tuning Info LOOK HERE

Has anyone tried the
"ASSASSIN" TRACTION BARS
made by Smith Racecraft, I bought a set for my 1970 Dart 408 they are very similar to the Caltrac's but are way more tuneable, Just wondering if anyone has any advice for me ..... Thanks !
PR I have heard some guys talking about them during bench racing sessions but as of yet none have shown up at track? No idea other than the gossip that they took a good idea and made it better.