I just tried to model their part in second part of CSWP core exam. (http://files.solidworks.com/services/certification/CSWP-CORE_Sample_Exam2010B.pdf)
I wonder, is it only me that had a problem with mass property? Question 4 (Stage 2)
Take a look at attached picture. I've got the right result only after playing around with these chamfers:
Is it possible to have this situation in the real exam. The difference is only 0.04 grams but the result is wrong - and you don't pass.