This is probably unconsciously inspired by my trip to NYC with its tall buildings. In Manhattan they really know how to make use of that third dimension! It has to do with scarce real-estate in the XY plane. This model has a very small footprint so you can print a lot of these in a small XY space. If you're short on horizontal real estate, go up!

The smaller footprint will also help you if you were having trouble with warping, you don't need a reliable raft for this print.

If you remove the extra thick rims that I added you can pack them even closer together, but I think that they will provide an increase in strength with only a little material added (which is offset by the middle hole).

They should print out fine without overhangs. Only use this printing method if you have a strong inter-layer adhesion, in other words, your printed objects should not easily delaminate. Otherwise printing it in the normal direction is advised. It greatly improves your printing speed if you turn on the towering feature in skeinforge, otherwise you get a lot of 'hair' between the objects (if you don't reverse the motor to relieve the pressure causing oozing).

// //////////////////////////////
// OpenSCAD USER PARAMETERS
// //////////////////////////////

angle = 120; // 120 degrees is a unilateral triangle, default
tilt = 30; // experiment if you have trouble with overhangs
seg1_H=26; // height of the lower segment
seg2_H=26; // height of the upper segment above the bend in the 'boomerang'
nX =3; // amount of objects in a row
nY =2; // amount of them in a column
spacing_X=20;
spacing_Y=20;

feet_on = true;

The feet will provide some dampening and make your machine more silent. You can add extra padding (Adrian's method is stacking pieces of double sided tape)