3DS Max - Tip - Attach Geometry With ProBoolean 

Hi, well if precision is important in what you're doing, you can combine several primitives so that they are not separate objects, this will make it easier to work with less objects, and at the same time, at any moment, you can comeback to any of these objects and change some of their parameters. One example, building columns, you can attach multiple boxes and/or cylinders, and if, for some reason you want to change the radius of one the cylinders to a specific value, or the width, height, length of a box column,... It can be handy in some scenarios