Paddle grips work better when they have a safety.
X2
A safety is a must. You can't just depress the paddle unless you disengage the safety first. I have a 3" cutoff tool that has a safety that's a pain, because it goes too far over center and takes extra fiddling to get it to release, but I'm not going to mess with it. I'd rather not cut off a finger, or even put a big gouge in one.
Another thing. ALWAYS unplug the tool before changing wheels.
[on edit} I guess if I had a battery operated tool, removing the battery before changing wheels would be a good safety practice too.
