4oct11 Here are some ideas for useful projects. 1. Fly-3D The Piet Hut n-body examples are all 3D but have no navigation. But iceCreamCone, for example, does have the aff-chaptrack navigation in it (though no thrusting). It should be a nice exercise in the Python extension-by-import feature to build a module to do this for several non-navigables without having to rewrite their codes (too much). This would become a preparation for the ogl.py to szgogl.py bridge for Syzygy. 2. A simpler version of the above would be to do this for a keyboard() callback to make an escape easier.