The only real trick to the install was properly tightening the spindle nut. Sounds easy enough, we have all done it 100's of times. But you need to know that its the pressure of the inside bearing against the O ring and the stainless ring that keep them from turning on the shaft.

When I assembled the 1st hub, I tightened the nut like I always have in the past. Tighten the nut hand tight and back it off to the 1st spot I can get the cotter pin into the hole.

Well in that mode the stainless ring of the spindle seal was not locked down and it would rotate on the shaft. So, for proper operation the nut needs to be hand tightened, then ADVANCED to the next possible spot where you can insert the cotter pin.

I worried about that much tension on the bearings, but in fact what you are doing is compressing the O ring and flexing the Stainless seal ring so they seal tight against the axle.

Put the Bearing Buddies and the wheel back on and head for the lake..