On 26-7-2012 17:25, Chaanakya wrote:
I've actually been using the manual pretty heavily ;)

Excellent :-) My /hint/ was half serious. I know from experience that 
some things need to settle down, so to speak, before being properly 
understood. Once you get the knack for it, csg becomes pretty easy 
(although I sometimes meet bewildering situations). Intersection and 
difference may look quite the same in the end and yet one or the other 
may be the preferred solution according to the case at hand. It helps 
(for me) to visualize how to do it in the Real World, with a piece of 
wood for instance.

Thomas

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