Triple Eccentrics, 4th attempt success.
The eccentrics are turned from 2 bits of brass, which are separated later. It was a trial and error effort, mainly error.
I tried soldering the parts initially, but mistakenly used silver solder. All was well until I tried to melt the solder, and so much heat was required that the thin brass parts were wrecked.
Next time I used Loctite, but during turning, the parts flew apart and were again damaged.
Finally, I Loctited the parts, then bolted them with the final bolts, then turned the disks. This method worked, but the 6 disks required almost perfect dimensioning on the milling machine during drilling, then the lathe for turning and parting. Altogether, very demanding.