I installed the never fails 2 yrs ago. I haven't looked at them but I don't have any issues as of yet.
I am not a fan of the nylon bushing, then when someone tries to sell me on wet bolts with nylon I just walk away. I built and troubleshot a lot of industrial machinery in my life and I've seen wear.
When I replaced the bushings on my TT I used "oil-lite" bronze bushing. I had to cut them to length and then ream them to size. I also installed wet bolts with them. I sold it 15yrs later and they were still in fine shape. If you try cutting a oil lite bushing and create heat, oil will literally drip out of the bronze. If I have a problem with the never fails I will go back to this method.
2012 Chevy 3500HD Dually 4X4
Crew Cab long bed 6.0 gasser 4.10
2019 Open Range OF337RLS
Yamaha EF3000iSE
retired gadgetman