I have a friend who is getting a GI Milspec 1911 by Springfield. I have another friend who has a Colt Defender. It seems that there are 4 tiers: Milspec, Custom, Premium, Ultrapremium. Maybe you have a different classification. What in your opinion is the usefulness of one class over another? I can understand the Premium class for those who compete at the Elite Level, like yourself. However, for a person who just likes to shoot at the range, is there truly a need to go beyond Milspec? If someone would like to use a pistol for Self Defense or Personal Defense, are there features in a 1911 that are a must have? What characteristics do you think are important in a 1911 for defense? Are there premium magazines that work best in most, if not all, pistols? Lastly, for 1911s that have sights integrated into the barrel, what options for upgrading the sights are there? Thank you.