Hi Martin,

> <...> hence me saying that I am using the pixel size as a unit size.

Ok, but I'm not really aware of this being a common practice to base your entire model size upon the pixel size of the background images... And doing this is what is giving you the side effect of using a fairly large numbers for your objects causing the "huge objects" problem that you mention.

Instead of setting up your entire model as if it was all made of pixels, it tends to be better to instead assign some distance inside the bitmap like along one line in it to be a particular unit size, then you can use the Image align tool to pick the reference points on that bitmap line and then set that to a matching line in the model, there's a demo of that here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1982.9

- Michael