Hint: All practical data on all aspects of the OSE Universal Axis-based 3D Printers.

Shipping

2 small idler pieces fit in a 55 cent USA envelope. Going to 6 of them - wight 3.7 oz - they cost $3.70 minimum as it is a 'stiff' package. Advice: send 2 envelopes with 3 pieces, at 55 cents each. Weight limit of a letter is 1 oz, with every extra oz being another 15 cents. [1]
You can ship irregular objects as they are, as long as the stamp fits on it. See [2]
You can design your own postage stamps! See https://photostamps.com/. But it is 2x the cost to ship.

3D Printer Data Collection