I don't yet have a microscope for SMD work, so lets make one.
So I have one of the Ebay standard PCB holders as shown here.
Works fine (except when the thumbscrew suddenly lets go, the PCB drops, and 0402 resistors fly all over the bench, followed by an immense amount of swearing).
Although I am deep into learning Fusion360, I bailed back to my Tinkercad for such an easy design.
I have a spare Samsung S7 phone, and the free microscope app is remarkably good.
Nothing too posh.
Two vertical arms replace the end caps in the base rail, and then two further adjustable upper arms allow me to tilt as I need.
I found a couple of M6 thumb wheels lying around, so there is a captive nut in the centre connection.
The tray is simple enough, and you could change it to suit your phone.
The cross bar that supports the phone is in two pieces, purely so that it fitted my small Flashforge printer. I just glued it together as I assembled it.
Not much else to tell, but it works quite well.
Also gives you the ability to take photos of the work you are doing.
The light on the phone is excellent for illuminating the workpiece, and the image is crystal clear (photos don't do it justice)
Below are the STL files. Have fun.