[maro]

Can you summarize your model constraints in a post?

[edsheppa]

I could post the c# program if you'd like, but to summarize: the population is maintained within a range (+/- 50% of a "niche size" parameter); reproduction is asexual - individuals die or split with equal probability except to maintain the population in the range; "normal" individuals become "mutants" and "mutants" become "normal" with the same likelihood; parents pass their state to their offspring (which may then mutate/unmutate).