Found n6sxb updated version of the soldering helping hands thats adjustable using a rubber band to hold the wires in place for soldering more secure than the soldering fingers. Threw up this profile to help others!

Print two copies each of the rotating and static jaws and one base.

Post Printing Instruction:

I wrapped some 400 grit wet/dry sandpaper around an exacto knife handle to sand the inside diameter of the pivot on the static jaw parts. It didn't take much to make this joint pivot nice and smooth. You don't have to do this. If they are forced together and worked loose, that will work ok too (as long as you don't break them).

I sanded the bottoms (the part that fits into the base) and the sides of the static jaws so that I had a good smooth, but tight fit. Be sure to get the bottoms nice and flat so that they sit flush in the pockets. I glued mine using super glue. They aren't coming apart. Wrap rubber band around em.

You can also attach small feet to the bottom to help it grip the table top.