I cured my problem of high end harshness. I also had a couple of other audio nuts come over to listen and see if they heard it too.
An oil filled motor run cap was exactly what was needed.
When I was trying caps I would try just a single different one in a single cabinet, put on something from my Beatles Mono box set and listen back and forth for any change.
I heard a distinct change when I put in the oil filled motor run. I then installed the other and I could definitely hear a difference.
I have now lived with it for almost two months and I am so happy. All the detail is there with none of the ear fatigue. My friends who came over again to listen to the change were adamant that there was a definite improvement. One said he could hear a big difference on all types of cymbals.
I am very happy. Thanks for the suggestions. I Can't wait to build some 4pi and maybe some type of towers.