It is very light. It is scary to put together or move panels in a slight breeze. The whole thing probably weighs 50 pounds. Weight isn't an issue at all anyway because it is riding on casters.
Very good job on the Sandcrawler and I saw that R2 dangling there...as for the sarcasm, it's all in good fun; you just have, sometimes, to breathe by your nose when on the RPF