Who gave you this advice? I ask because I would not take any advice from them.When you change to V3, you are supposed to change the lever to the one with no lettering. I am told that you can incur liability problems because the V1,2 lever has an "s" on it and your gun no longer has a safety. If some idiot (sorry, not pc) If some one picked up your gun and saw that it was on "S" and they pointed it at some one and the idiot (there I go again) pulled the trigger assuming the "safety" was going to stop the gun from firing, you can bet you are going to get sued and lose. It sucks because the lever without the letters is 3xs the cost of the one with them. Charge more not to put them on? I like the V3. Both of my carry USPs are V3.