I have just uploaded a first rough set of example code which is intended to exercise Cells with a progression of challenges, in the order I might follow when developing a port of Cells to another language, or when validating cells after an enormous upheaval. I call it the tutorial directory, but it could also be a porting guide and a more concise regression test than the random mish-mosh in cells-test. I do plan to put future energy into this code as a regrression test suite, so... watch for a name change? :) kt