Still rebuilding. Swapped the MC21 swingarm out for an MC28 (Thank you to the Tyga folks for tech advice on that). New chain, all is good. I adjusted the chain by rotating the toothed wheel on the LH side of the swingarm. It worked, but not sure if that was the correct way to do it. Loosened the large pinch-bolt before rotating it, of course.
I really did search the forum before posting this....

Thanks
Jeff