Interestingly, for super fiddly stuff it turns out using a microscope is practical. First saw it done on the Strange Parts channel on Youtube. eg: https://youtu.be/rHP-OPXK2ig?t=20m32s
The guy there got sick of fiddy stuff too (pre-microscope), and apparently after getting that microscope his hand steadyness improved dramatically. There’s further info on that specific model of microscope too (stereo optics, etc) in case it’s useful:
Getting one is on my wish list, but not sure if it’ll actually happen. 