I love the idea, but in order to make this model fully functional, it needs 4 stones of each color. In that way it can be used as an educational tool to show:
a. play, b. capture, c. living groups, d. suicide, e. seki, f. superko rules, g. chinese vs. japanes rules, the longest possible game on a 2x2 board (58 moves so far, see http://senseis.xmp.net/?LongestPossibleGame#toc7).
I'd like a 9x9 goban, could you design and/or print that too? I haven't found any other sources for a "traditional" design 9x9 board . . .