Koetsu Rosewood Sig or other Koetsu on medium mass arms

Hey Einstein, it sure ain’t rocket science!
https://www.gcaudio.com/tips-tricks/tonearm-cartridge-compatability/

@fjn04 

Send Franc Kuzma an email and ask for his opinion/experience.  

Frank Kuzma is a very interesting guy. Here is an interview. It transfers to English during the interview.  https://www.youtube.com/watch?v=UWvXgfjEPoA
He will do and try just about anything, any type of tonearm, any type of turntable. The only thing I can think of that he does not do are MM cartridges. Like Frank Schroder some of his designs go a step further into the brilliant category like the 4 Point arms. He now makes a full air bearing turntable. Some of his designs violate his own principles, I guess out of his desire to meet market demands or keep the price down. The Stabi M is a fantastic turntable.

According to posts on this site Mark Baker offers some of the worst customer service of any equipment manufacturer which is sad because his arms are not bad.

Franc said via email... his arms are designed to work with the best low compliance cartridges. He certainly went further with a more technical explanation, but I didn't want to quote him word for word. He also brought my attention to a recent Dick Olsher review in TAS, which I had already read. Dick had the Rose Sig on my exact table and arm. The review wasn’t the best written, but he certainly liked the Rose Sig.