Ltg-701 lightguard - Crimson Trace LightGuard Flashlight for Full Size 1911 Pistols

I probably should have given the LTG-701 5 stars, but apparently I didn't do enough research in exactly what 1911's this item will and will not fit. I purchased this light along with the CT LG-401 laser grips with the hopes of mounting both on a Ruger SR1911. The laser grips installed and function perfectly on this pistol, but the LightGuard LTG-701, not so well. It came so close to installing, but fell short where the trigger guard,light pressure switch meet. In the defense of Crimson Trace, the box states: "Fits most Kimber,Ruger and Smith&Wesson E-Series 1911....". I assume the only way you should buy one is by letting the seller let you try it on your pistol before buying???