Macbook Air Laptop Stand

UPDATE:
I have redesigned the crossbar to be a little mor solid, although it now makes the stand a little thinner. Still wide enough to support a 15" pro, and also thin enough to support an 11" air.
Description
Small 3 piece Laptop stand. Suits Macbook Air 13" but can be modified for any laptop. Also includes small holes in the side to slot a different crossbar section in (not included).
Kit Includes:
- 1 side pieces (print once for each end of the stand)
- 1 crossbar.
A note about the crossbar:
The Z-height of the crossbar when laying flat on its side is equal to the width of the slots that join to the side. It is recommended that you print the 2 copies of the side piece first, and measure the width when standing up, then adjust the size of the crossbar accordingly.