Are you familiar with the “Dave” method of using scaled components to deal with SketchUp’s small-geometry behavior? I (and many other people) use this all the time, it is very useful for screw threads and mechanical fittings with small details.
Edited to add that I work in inches, and I use a scale-factor of 100 with the above method. The 100X scale still encounters some small-face problems, but not many.
A larger factor such as 1000 would probably avoid most of the remaining small-edge issues, but it would exacerbate another of SketchUp’s problems - clipping when the camera gets “close” to geometry. In my model I have 1:1 scale objects and one or two 100:1 scale objects that are under development. I sometimes need to look at the 1:1 portion of the model for context, and the 100X objects cause clipping when I examine the 1:1 part of the model closely. I think the clipping would be much worse if I used 1000X copies.