For assembly work I use x10 with my Swift S41-20 microscope. While I have x20 as an option, it is too much for assembly/repair work, but can be useful for inspecting boards. I don't know about the working height of the KS37045A, but my Swift has quite a distance between the optics and the board, it doesn't suffer from fumes fouling the optics, although I do use an extraction fan/charcoal filter to clear fumes from my work area.
Those clips on the KS37045A base are no use for PCB work, you need a holder that can be rotated to give you the best access. I use one similar to eBay item 355132564039, although mine was cheaper than that item.
SJ