Mamiya 7 - 150mm lens issues, any thoughts?

[Ti29er]

Apologies, I'm brand new here and was unsure where a post about Mamiya 7's should go - I've managed to duplicate this question in the process!
I am looking at a lens that a friend is getting rid of. This is how he's described it and wondered about the barrell noise & I wondered if this is trouble brewing or if it's normal on a used lens.
Thanks in advance.
Tim

"The focus ring makes a very silent sound when going out of infinity for about 1mm; this may be caused by the moving element when it releases from the velvety section of the interior. It is only audible when you put your ear next to the camera and no friction can be felt whatsoever; furthermore, it sounds the same every time and only happens at the said position, so it's most probably normal (?)"

[t.s.k.]

The 150mm for my Mamiya 6 has an electronic ribbon that connects between the gold contacts and the shutter. The ribbon is folded within the housing and slightly rubs the barrel "silently" while rotating the entire focus throw. I really have to put my ear to the lens to hear it (unmounted) but would otherwise miss it in normal use. My guess is the 150mm for M-7 is designed the same way.

btw, the original poster (you) can delete an entire thread at your wish. Perhaps you should poof the other post?