I have read many of your posts, and decided a 1911 is a must have to the collection. I am very very limited in my knowledge of pistols. I see many of you have add-ons. While I dont need all the bells and whistles, I would like to know what the must have features are. I have heard terms like dove tail, or beaver tail and to be honest. I am clueless as to the meaning of it. So please, what do you consider, a must have addition on your 1911.