Ash, did I tell you before those designs are reallllyy good. you must have worked hard on it in Google sketch, since making a grove is a little difficult for me still. and on my Vista crap, Google Sk does not work, have to find out why.
I can work mainly on AutoCad for drawings.
Raj, Catia, is one hell of a bomb. And Ansys!? wow both are crazy softwares. Ash you know, Catia is used by Boing to design their 747/777's !
sadly it's kindof not free: Catia MD2 (Basic?) costs about $14,000 ^_^ plus 14% every year for renewals. But if we are not using it for commercial design then its a different matter (I guess).