Yes, I know, it exports using Wings units, which are arbitrary, and... well, ever try finding a contact lens that you have dropped, or a stray screw? I haven't had the former happen, but the later is really a pain. lol The point being, I have started working with Wings3d, to build mesh for Second Life. The latest build I made was three "towers" with pipes running between them. The idea was, to replicate this, more or less: http://www.kothe-dt.de/uploads/pics/vodka.jpg
The pipes being made so that there where "junctions" at the top. This means that I could have only one, two, or even three, etc. of the central stacks, along with the boiler and the silver condenser tower, at the end of it. So far so good. Export each tower to dae, import each one into SL, and the size ends up being something like 0.0064,0.008,0.005 meters, give or take, for each one of them (some variance, due to them being different heights). Ack!! Create a copy in world, and... be really thankful that the ground where I am is dark colored, instead of wood, or sand, or anything light colored (wood is the default texture when you haven't uploaded and assigned the textures yet).
So, now I have two problems - 1) My newly uploaded mesh is two pixels tall on the screen. Well, OK, maybe 4. 2) I can't "uniform scale" the thing, based on a percentage, or any other metric that can get it the exact size its supposed to be. 3) the thing is so small, if I create copies of the other parts, then try to link them, the camera literally can't zoom in that close, so that I can even attempt to link them all, and scale them together.
Ok, so.. Here is the thing, how hard would it be to add a dialog to the exporter, so you can set a specific unit size, if you need to do that for some reason, to use it correctly in the application you are importing it into?