This 1x2 gridfinity module holds a digital caliper horizontally. It is stable even without a baseplate.

It prints without supports, but I recommend watching the first layer go down to ensure the circles around the magnets all stick as expected. Once the first layer is down the rest should print with no issues.

I sliced it for PLA with 0.2mm layers. If you reslice it, I recommend 3 perimeters and to print the outer layers first.