...can be a wonderful thing!
Continuing to hack away at my Steam Tank in Google Sketchup, and it occurred to me that if I plonk some appropriately scaled miniatures in the model I would be able to adjust the view ports so's the minis can see out.
I tried to find a seated man for the Gatling turret, but it proved too fiddly to scale down to the same size as a 20mm miniature. Should be right though.
Now if I could only figure out which bit on the 2D paper print out corresponds to which bit on the 3D model. (Speaking of which, I've somehow managed to reduced it to 12 A3 pages now!)