I've always found photographing LEGO models hard; those shiny bits of plastic reflecting stray lights, the unifomity of colour, the limited depth of field, and so on.
On Sunday, I tried this approach, which worked quiet well. I mounted the camera on the tripod looking straight down onto a stretched canvas (usually reserved for paintings), and placed the models directly underneath. I also went out at midday to get a constant ambient light source, and minimize shadows from the sun.
The photographs you've seen this week are the results of that rig.
Tomorrow, I unveil the reason!