Thin walled tubes with small diameters can be well used in architectural model making. Cutting work on the brass tubes can be done with a Circular Saw or manually with a household saw or a Metal Frame Saw; they take very well to soldering and gluing work can be done with two component glues (e.g. ones based on CYANOACRYLATE or EPOXY), for model making Ruderer plastic glue or Uhu hard will also suffice. When bent, the tubes will not buckle if you take the precaution of tightly filling them with sand and closing off the ends beforehand.