Are you still looking for that perfect PCB holder? The low profile PCB Stickvise might be just the thing you need!
In performing the simple task of holding a PCB near table level, the Stickvise is great because your hands can rest directly on the table, allowing you to steady yourself with minimal effort for fine soldering and probing. The Stickvise also fits easily under a microscope and keeps PCBs consistently in focus.
Set the width slightly smaller than the size of your work-piece, compress the spring, slide your PCB into place, and release the springs. Easy, fast, and repeatable.
While the design is simple, it doesn't limit you and is totally hackable. The nylon jaws that come with the vise hold a PCB 5mm or so from the shaft, giving you clearance for most layouts. If you need something a little taller, there are 3D printable designs on the site for taller jaws, jaws with slots to keep cables out of the way, and even High Temperature PTFE Jaws.