Bought my first 1911 the other day (SA parkerized Mil-Spec). Took it out this week and got the dreaded hammer bite (ouch!). Looking at adding a beaver tail grip to help keep it from happening again. Was looking at a Wilson Drop-In to add to my gun. Found one at MidwayUSA http://www.midwayusa.com/viewproduct...tnumber=954488. Didn't know if anyone has any experience installing one or not and could maybe answer a few questions I had. Do you have to replace the factory spur hammer with the commander hammer? Is it truly a "drop in" part? I have no desire to grind away the frame just to install the grip. Was hoping to pop out a couple of pins and have the new grip installed in 30 minutes or so. Thoughts?