John,
Your knowledge is impressive and your opinion seems sound, thank you.

My opinion of the Yamaha 9000 Pro after owning and returning it after one week was positive. I loved the way it looked with two goose neck lights. My objection was weight more than 10 than the Kn7000.

I do not dispute your statements in your post, I do not have the knowledge to do that but in all fairness we must include the popularity of the Kn7000. The romance and desire not to part with the Kn7000 you have. Scarcity caused by the gentlemen you mentioned may be a fact but there are many owners that will not part with the Kn7000; in my opinion this fact has a lot to do with the scarcity.

My second thought is that you rarely hear about the 9000Pro on any forum; and why did they stop making that model. Most of the posts I just finished reading said they liked the instrument but. To my knowledge the Kn7000 has almost a spotless rep.

Only my opinions, John C.