Took a break from my magnetohydrodynamics problem set today to start the update to 1.2.3. The new height limit is really great for the missile defense system; it gives enough of a lag time between firing and impact for you to evacuate your base when the alarm klaxon sounds. I should have at least a teaser image of a fully-functioning defense system up by Saturday.
(Protip, don't fire an incendiary missile at a jungle - in addition to frying the poor little ocelots, you'll never put out that fire)