N/A Hw44 indexing faul

Hi all
I had a fault with my pistol so I stripped it down.
And found a spring rolling around inside the trigger mechanism.
I've had gun back together but now it wont index the magazine.
I'm beginning to think this spring is part of the indexing leaver beneath the trigger cassette.
The indexing leaver is sitting to low in the gun frame to reach the magazine.
I'm wondering if somebody out there has a pic of the indexing part of the pistol as my schematic does not show this part of the gun for some reason
These are the pics of the indexing parts I have and the wayward spring
Any help greatly appreciated
Regards
Paul

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