Ah.... 3 dobs of weld faced off to the same height/evenly, on the inside of the washers for the inner race of the bearing to seat on and jobs done Landyacht.
May have to shave a bit off the outside to compensate, or just spread the forks a tad.

Now that makes sense to have a washer there as the seal isn't moving.
If you are not racing against anyone, I'd be only too happy to pack them lightly with grease and wear these ones out (if you live long enough , they look pretty solid).
The extra drag from the seals (mainly) and the single roller of the bearing, compared to a single ball, would not amount to a huge amount unless there was someone beside you to compare it too.
I say a "single" because at any one time that's all that's supporting you, even the contact area of the departing and approaching ball/roller in the cage equals 1, if you dismiss side load.
Rolling 6 cages full of rollers, will have more resistance, but for all the extra effort to alter it, I wouldn't worry. It would be hard to pick by yourself.

Just get it put together, your in for a great time with this very nice yacht.