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Automatic mainspring slipping end repair

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I want ot show you my way to repair broken slipping end of the automatic mainspring. 

1. Firstly I drilled mainspring and slipping end with 0,3mm driller.


2. I made the rivet


3. Mainspring and end riveted


4. Clinching the rivet with pliers



5. Rivet grinding with file and water paper





6. Mainspring installed in barrel



7. Completed. I have checked if it works well. I have 9 full turns of arbor before mainspring starts to slip at the barrel wall. I think it is quite good. Some service manual says that 8,5 turns is a good result.



What do you think - is it good way to repair this malfunction? 


Edited by jackie01

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