sunkko 737g spot welder modification

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Right out of the box this welder did weld, but only at the highest setting and only the thinner nickel plated strips that came with it. When I tried to weld 0.20mm solid nickel strips, I found that even on the highest setting the welder was unable to do its job. Sorry, I should have shown video of the welds before the modification but this video was too long already.

After modding the welder I was easily able to weld 0.20mm solid nickel even on the positive side which is harder to weld to to begin with. I also noticed that I had to turn down the current when welding the thinner nickel strips and that's the way it should work.

amazon.ca link for welder
https://www.amazon.ca/dp/B07XP3SS73/r...

amazon.com link for welder. https://amzn.to/3d4P8xa
amazon.com link for 1/4" heat shrink - https://amzn.to/3sFFGrL