oh yeah have alook at the videos as well - loads of stuff I didn't know :-)

Like you can actually change the default idiot settings. :-)
Save time if I know the low, medium, and high settings are the ones I set myself.

https://www.youtube.com/channel/UCQP0KuWKndRvvTbLVYWZXnQ/videos

Ah - just found out you can make a low poly ,odel with it as well.
As the skull I'm trying to make a mould of for my niece has too much detail and crashes openscad - that'll be useful :-)