Yeah, focusing the Veho at maximum magnification can be tricky!
Try a quick google image search of “microscope stands”. There are a lot of stands out there which can also give you some ideas for a simpler DIY version.
I’m thinking of one now, too…..
One of the things I do with the veho on the WEPS is to use it while the knife is still clamped. I simply hold it against the blade and fiddle with the focus. All my WEPS pictures are taken that way.