The best (very affordable) modeler I have ever found for booleans is Turbocad v.7x or later. It is just flawlwess and it builds solid models as well. Very complicated shapes can be booleaned then imported with excellent results into Carrara using .3ds. Turbocad is not too dificult to learn and once learned, you might not ever go back to Carrara for anything but the excellent C2 renderings and some vertex modeling... (renderings stillsuck in Turbocad). just thought someone might like to know.