I don’t know if Audiogon supports images; I always post images here from a third party source, either my own website, or a third party hosting site (some of which, like Flickr, are pretty good and free for a substantial number of images).
Someone may be able to discern whether a retipped stylus was correctly mounted; I would also want to know if the cartridge was a Sugano Sr. one rather than a later model. As to your conclusions, you did the right thing in terms of listening on your system. I see that the TT you have had a facility to mount a heavier head shell; the Koetsus tend to sound their best in higher mass arms given their low compliance. I enjoy mine--newer stone bodied types, but obviously, different systems, tone arms (I use a modern linear tracker) will yield different results.
PS: @jasonbourne52 - I’m not sure these cartridges were ever known as monsters at tracking, compared to the something like the old top line Shure V15, but they were certainly highly regarded for their tone and the more modern ones in my experience brought that quality to the frequency extremes, not just the midrange, which was what the Rosewood was known for.