How to build a cheap light tent - update

I have decided that I do not like my light tent. It is entirely too large. I have three lamps that I put up around it and it just does not light the model like I think it should. I have even put in a proper back sheet and lined all of the brown on the inside with white poster board. It just isn't cutting it.

I am going to try building a smaller light box and see if that works any better. I have enough sheet left over from last time so that won't be challenge at all. If the smaller light box does not work I will try a larger wattage of light bulbs when I am taking pictures.