Thanks Michael,

I think i'll stick with moi for now as i already use archicad and c4d for modelling as it is! I just admire the apparent intellegence and flexibility of the direct modelling approach. Would be great to see some more history based model update features in moi, like adjusting fillets at a later date etc. Currently is it right that not all sweep opperations update automatically? I have experimented with paths that are besier based which do update the sweep object as the points are moved but if the path consists of straight lines the sweep object wont update when the paths points are moved. Will this sort of behaviour be fixed when you come to look at auto mitering of sweep shapes?

Cheers
Rob