I have a PS90 TR and am thinking about buying a Streamlight TLR-2 to mount on the side. I have an Aimpoint M2 mounted on a GG&G standard Aimpoint Comp M ring. My question is this. What is the best method of going about mounting the TLR-2 to my rig? Are the tiny side rails that come with the TR going to work for this application? I have also seen two different extended side rails for the TR. One three slot and one five slot. Both of which are designed to sit further off to the side to accommodate wide based optics on the top rail. I would like to keep any side mounted accessories as close to center as possible for balance. Any suggestions?