Just built something similiar to what is at this link: https://www.youtube.com/watch?v=rOiC2SlNQOQ , only a little longer. Did some test shots and the results were surprisely good. Not perfect as I made the box too wide thus the lights were further away. For smaller models, a small size box, like that in the link I posted, is sufficient. Also, a third light is a must. The third light being at the top of the box. I think the more light, the better the exposure without much editing.