I have actually finish designing the pivot blocks that uses the new lazer zx-5's bushings (LAW32) and the TF-018.
IMO, I believe that rubbing dissimiliar metal together is not a good idea. There will be more wear.
With the use of the delrin bushing (LAW-32), I think it will be more smoother.
I am not sure if they will be popular. If not, I will just produce only a few sets