Solder Paste Stencil Jigs

The question

How much assembly time does a proper stencil jig actually save, and which design wins?

Where it stands

Six jig geometries printed and timed across twenty boards each. The most elaborate — a four-side clamping frame — was slower than the simplest two-pin corner register, because clamping took longer than the alignment it saved. The simple one is now standard.