Hello everyone. Say I was watching one of Richard with BWE UZI training videos on how to disassemble and re-assemble the fire control group. He mentioned that the trigger in the older version grips had a spring attached to that part that sits on top of the trigger preventing it from moving I guess to the left or right. He added, he didn't know why IMI didn't use the same spring for the newer version grip frames. So my question is, how important is having or not having that spring in place. Mine didn't have one and I am thinking of installing one.