Are the sear spring spacers really necessary? I have a model 12 that has a spacer. I was just working on my 110 and it doesn't have one. I've looked on savagearms.com and can't find them and I've looked on numrichs and can't find them there either. They definitely are a paint in the rear to put back in but if it should be there I'd like to get one and put it back in.