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My quest is not direct to a 7x12, however, it is close to EDM ?

For next Christmas I have to connect many 2 mm iron strings together, in all directions.

I can made 1 mm holes and screw or nail them together, I have done it on my protos.

Soldering is also an alternative, however, not my favorite.

The wires are in tension, so when I start soldering the second spot, the first (#¤%¤#)

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So I am asking for advice to shop a small “welder” for 2 mm iron wire. Only 500 “welding” connections.

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/johannes

Mexico

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PS this subject is total new for me.

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