When converting to hexes how are the quality of the JC hexes?

I really want only JC parts on my buggy.

Also what allows the wheels to spin with hexes?

Do the bearing that I used to use in the wheels go in the steering blocks with hexes?

Also I am guessing I need axle pins up front too?

What is the part # for the lock nuts that go in the hex steering blocks?

Thanks and sorry for so many questions.