"Hello, and welcome back to the aperture science computer aided enrichment center. Your first task is to build a bridge, so that a test vehicle can reach the test chamber exit." This is the test vehicle you may have encountered in one of the Aperture Science Bridge Construction Test Chambers.The model is approximately 1:61 scale and 85% accurate to that of the actual vehicle being utilized in test chambers.
I decided to model this because I wanted to make something portal related but found that most things that come to mind were already done, then I remembered this game existed.The model at it's default scale prints at a height of 32.8mm, width of 46.6mm, and length of 17.2mm. My print had a very fragile cage with a portion of the top being missing, I plan to print it again with better settings, and I will upload a second, slightly less accurate model with a thicker and thus stronger cage. Please print for yourself, give feedback, and enjoy.