That section is indeed very handy (thanks Guitta for assembling it). But I didn't find anything to really suite my specific needs there, unfortunately. Perhaps nothing exists like that. What I'd really like I guess is a souped up CSG boolean modeller or something. I did grab Anim8or though, which will serve some of my other needs quite well. By the way - a couple of the links on that page are slightly wonky. The one titled "Free modeler" should point to http://www.ppmodeler.com, and the Wings one should point to www.wings3d.com.