What are the main differences in the 2008 v.s. the 2010? I remember reading about some internal parts being changed as to how they were made? (not molded) Any other diff? I can buy a slightly used 2008 for 500.00 less than a new one. Are the stock sights the same between the two? The 2008 has brown wood grips instead of the black/grey grips on the current one. Have they been changed?? Thoughts????Help??? TIA.