Likewise, I also was impressed with the possibilities of Willem's post and had a look at what was available locally - coming up with a small LCD digital microscope from Elikliv via Amazon for the no-brainer price of 54GBP including delivery.
With Prime, this arrived the next day and immediately unboxed to see what would be possible.
While the distance from scope to baseplate is quite small, it is perfectly easy to rotate the scope 180degrees and sit on a shelf (with a weight holding baseplate secure) and work hands-free underneath. You can also take the scope out of the bracket and move it manually over the work area to check what you are doing.
My one concern was that there might have been a delay between moving say, a brush, under scope and seeing movement on screen. There is no delay. It feels akin to a surgeon performing an internal micro-operation via a screen. Lack of depth of field is a major disadvantage and will require some getting used to, but the magnification on tiny parts is stupendous and I think I will be using this a lot.
See picture of magnified seat buckle within the cockpit of a current project. The LCD picture is very clear but my photo has caught a bit of 'flare' off the screen. The buckle however is clearly visible.
A USB cable is provided so you can attach to your laptop or PC and view via a larger screen, (I have an old, (pre-smart,) 65inch TV connected to my workroom PC so could have the pictured buckle several inches wide on the big screen if I so wished!)
Well worth a few quid I think.
Sandy