Grundig RPC 350 Arm Help

Can anyone help ? My pick up arm on my Grundig RPC 350 is broken, the thin metal tube snapped. I have a new one but need help in how to replace it, how to dismantle the old one to replace the tube on the arm. Please see images below. Need to know which screws to take out and how it comes apart. Thanks.
 

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:cop:

I have to delete the links within your post as they locked the page up. The links were thousands and thousands of characters in length.

This is just a tiny fraction of it all...
 

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I guess you'd be more successful if you were asking for a Dual 1237 tonearm instead of some Grundig thing. Btw, they're still available as NOS parts here in Germany.
Where are you living? I think that I could offer you an arm that I've pulled fron a scrappy 1237.
Best regards!