Most people have limited or no situational awareness and would not notice a model 29 on your hip....I have never been made except if I'm hugged....which shouldn't matter unless it is the kiss of death from a Corleone....but you could always say its your cell phone....never been questioned on that one either....and I bet no one would notice if you stopped untucking your shirts too...but if anyone does ask about your sudden sartorial change, tell them untucked shirts give your torso more length...not only will it solve your problem, but they will feel like they learned something
I usually IWB for maximum concealment, but I have worn this alessi CQC/S with nothing more that a t-shirt over it and on one has been the wiser. And this is a lot more gun than the airweight smith....