I am looking to upgrade some parts on my Kimber and RIA and would like some help selecting the right parts. I'm looking to replace the main spring housing on both and they are full size. What would you recommend? Brownell has the Wilson Combat V-Grip Mainspring Housing, is this a good choice? http://www.brownells.com/handgun-pa...using-prod21091.aspx?psize=96&avs|Make_3=1911 What trigger upgrade would you recommend for the RIA? There are so many to chose from. What I am looking for is a better trigger pull at a desist price. Thanks for the help.