I'm more than likely going to be picking up a 590A in the next few weeks. I may add some tacti-coolness to it later on. As the extent of my gunsmithing consists of adding a hogue grip to my glock, I've got a few questions. 1) how simple is it to switch out butt-stocks on a 590a? 2) is this something a do-it-yourselfer is capable of doing, or should I have a 'real' smith do it for me? and one related to nothing at all, 3) what accessories (if any) do you find the most useful for your HD shotguns?