Quote Originally Posted by Ian Cartmell View Post
I had an FWB 300 diopter that was seized on the turrets... I liberally doused the whole unit in WD40 and then popped it in a plastic bag sealed...
Repeated the process each day whilst turning the knobs as much as they would shift, after some patience and about a week of this process they are now smoother than a dolphins bellend.
That rubber eyecup is the same as the one I have.
I put a little wd40 on it yesterday, but will try that. Thanks.

If your willing to part with the eye cup, id certainly be interested. 🙂