See if you can find a copy of a now defunct(I think) app called MECN Tree Factory. It's a bit of a pain to learn, but can produce some very interesting trees(see image). It may no longer available, if not let me know,.........I believe this was a free program towards the end of the existence of the company that made it.....TOM(sackrat)

"Any club that would have me as a member is probably not worth joining" -Groucho Marx