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@Olly398
Okay I was gently cleaning my trusty 9 speed record derailleur before building onto my new project frame. Unintentionally I dislodged the little circlip which holds the assembly of spring and positioning tab on to the mounting bolt, and it all came to pieces. This happened in a kind of trance and I noticed nothing about how it was put together.
Now, having cleaned and greased it, it should be simple enough to rebuild. The little positioning plate goes back over the bolt, with the spring secured in the little pin hole (on reverse of plate, not visible). Before the circlip can be replaced though, the plate must be rotated anticlockwise against spring tension until the tab goes behind the "tab stop" on the mech body. But I found this very hard to do and wanted to check I'm not making a fundamental balls up before I force anything. Any tips or tricks?
Thanks in advance - Olly