Spot Welder from microwave - how to increase the power

How to increase capacity. Grant Thompson unique Spot Welder and trying to understand why a smaller and 220V transformers to work not so good. How to solve it.    US and Europe are different transformers.    A few more facilities improvements. Details from an old microwave oven. Previous video and Tricks: https://www.youtube.com/watch?v=VE64cIdLOKw https://www.youtube.com/watch?v=UKHyEg9vxrs https://www.youtube.com/watch?v=z5vBt6Jj7XA https://www.youtube.com/watch?v=jtX11xG_BgI https://www.youtube.com/watch?v=D0jDCPaTTXQ&t=9s https://www.youtube.com/watch?v=uHroFcKKNQ4 https://www.youtube.com/watch?v=HrkWY6gh0dA&t=7s https://www.youtube.com/watch?v=34idocD7I3Q https://www.youtube.com/watch?v=EWf0qNfdOcs&t=2s https://www.youtube.com/watch?v=XQ0xJo5j7UU https://www.youtube.com/watch?v=p9PjxeElPk8&t=6s https://www.youtube.com/watch?v=3k_wcpLsO6s https://www.youtube.com/watch?v=9mn7g59AEPQ&t=237s YouTube Audio Library " Hear The Noice" John Deley and the 41 Players "Hit My Soul" Silent Partner