Chainsaw Repair

Today mechanic at shop find an old used sprocket cover with complete brake assy from a 116si or 120si. I buy them for 50€, I'm feel very lucky.
There's only one problem: the brake spring it's broken, several years of use worn out it.
The hand guard is good but the lever it is bended; it's not a big problem.

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Then, this is my idea for rebuilt the brake spring
I use a steel band; I bend them around a pipe and after that I file the parts where it overlaps (where it must be less wide).
At one extremity I bend it for fix it into the cover, at the other extremity I fix it with a pin at the part connect with the brake lever.
I don't really know if this solution works but the steel band seems strong and thicker than the original spring. We'll see...

In my hand a steel band, the same I used for rebuilt the spring.

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At the left the new spring "self-builded" compared with the old one at right (you can see the worn out extremities).

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I have not reassembled the brake in the cover yet.
For now I'm at this point, during weekend I will go on.