Fidelity Research cartridges


Any FR cartridge experts out there? Raul? Dertonarm? Syntax?
I have had an FR-7 which I bought a while ago. I tried it ever so briefly when I got it on an arm I now recognize as not being able to handle that weight (close, but no cigar). I just now pulled it out for kicks and after getting it adjusted with the big counterweight, I am VERY pleasantly surprised. Actually, I'm feeling kind of bubbly. It does not dig out the utmost in detail, but it just sounds very right.

Are there any other FR carts out there which are real steals if still in good condition? I know the MC-702 and the FR-1Mk2 and Mk3f by name, with good reps being assigned to the Mk3 and the MC-702. Given that the MC-702 and the FR-7 look quite similar, and they were offered at about the same time, what is different? And is the FR-7 just an integrated headshell version of the FR-1Mk3?
t_bone
Yes , special  for ''choose chakster'' . I am wondering why he
bought Ikeda 9c, III without insurance that the precious can
be repaired in the West? But he may think that provided the cart
is new or NOS it will function for the rest of his life.
But he may think that provided the cart
is new or NOS it will function for the rest of his life.

No, i don't think there is any cart in my collection that i will use for the rest of my life, still searching for "my sound" and this is the reason to try so many. Each MC i compare to my best MM. 

The only way to understand is actually HEAR/USE the cartridges.
I don’t want to change/swap cartridge or toneam utill i understand the sound character, the reason why some carts waiting in line. It’s the process, time consumming. I am stuck with Miyabi because it’s a pure pleasure to listen to it, so nice that i don’t even want to change anything. On the right side last night there was my Glanz 61 on EPA-100 and it was also great, but different. 
My Gosh what an romantic picture. If this picture say something
about you than I understand your problem. But there is this 
prosaic saying : ''love make people blind''.