Here's another big board.
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This is the main part of a test set to production test a laser controller.
Upper-left is a MicroZed, which is the compute/FPGA and communications bit. Upper right are a couple of the cute LTM switcher bricks.
This connects to the DUT, an oscilloscope, a DVM, and a Keysight counter, so there's nothing on this board that needs calibration.
There are a bunch of TDR test traces and SMA connectors, just for fun. I'll populate them on the solder sample board. I can probably just push on them sideways to connect for a second, no need to solder.