Shutter ring tightening?

I'm tempted by a Koni-Omega Rapid on the famous auction site. The seller mentions that the shutter ring needs tightening. The camera is the model with the Hexanon normal lens and I believe the shutter is a Copal. Does anyone have any idea how difficult this job might be?
Thanks.

Unscrew the front element and there's a ring beneath that either has spanner notches or a wave configuration around the circumference. After seeing which it is, it's righty tighty etc.