I just tried out my buddy's RIA Compact (CS with dove tail sights) and it was great. I went to try to find one to buy, but none anywhere. I did come across a Citadel Compact for a little more money than my buddy paid for his RIA. Tempted to buy the Citadel. Questions: 1. Is this the same gun as the RIA, made by the same manufacturer? 2. Does the Citadel also have a lifetime warranty like the RIA? 3. How difficult is it to put an ambi safety on one of these? Thanks.