Tangentially, does anyone know if there are any off-the-shelf or DIY solutions to overcome hand tremors while soldering?

I have read about micromanipulators:

- off-the-shelf (https://www.singerinstruments.com/solution/mk1/specification...)

- DIY (https://www.microbehunter.com/microscopy-forum/viewtopic.php...) (https://retrotechjournal.com/2017/10/03/make-yourself-more-p...) (https://www.sciencedirect.com/science/article/pii/S246806721...)

They are very interesting, but don't seem to be suitable for soldering.