I have a S&W model 37 (Airweight) with an exposed hammer. I have recently gone from an OWB carry to a Galco Deep Cover IWB carry for this gun. I am going to have to bob the hammer not only for comfort but also practicality. There is no one in my local area to do this work so I will Have to send it off. My question is this...should I just get a new hammer from numrich and send it to someone to bob, or do I need to send the entire gun. Once I have the hammer, there is someone locally to do the installation. I would prefer to just send a hammer to someone.