You somehow have to get a thin sheet of material that has a perfectly sized hole where all of your solder pads are. It’s not exactly trivial to cut them out by hand. [Juan] recently learned a ...

but which doesn’t come with a solder stencil. That was what faced [Honghong Lu], and she rose to the challenge by taking a piece of PET sheet cut from discarded packaging and hand-cutting her ...

Dry-fitting the tube and fittings before soldering will ensure that the fittings are square and the runs straight. 2. Cutting ...