So here I am with my old brain trying to redo my entire bike. I know I should have done it one thing at a time. But the whole thing is pretty much apart now. I just am not sure of these parts. Washers, seals, plastic bearings etc. Some are concave washers. Might be from new steering stem too.I just don't want it to fall apart on me flying down the road at 70 mph. Anyone steer me in the right direction?