I want a simple 3D plan that I can send to a 3D printer. The basic structure is a cylinder, about 140mm high, 40mm diameter; 2mm wall. The sides of the cylinder has several good sized rectangular perforations all over it, except the lower 30 mm, which is just the solid cylinder wall.
The top of the cylinder is capped with a half sphere of the same diameter.
The base of the cylinder rests on an oval base, with a perforation the same size as the cylinder. The oval should be about 45 by 65mm size.
I have tried 123D, but I keep messing up :-)
Enclosed is a poor example