Jimbones, I have a roundover. I have asked that question before. Danny said that it isn't crucial, that it may help a little, and won't hurt. I used a bigger roundover than the smaller drivers use. I used a 1/2". I set it in the router just a tiny bit short so it wouldn't dig out where the driver screws would be. I use 3 washers, cutting the tip of the screw and I didn't go through.
I will look for an old wire cutters and try that. I just feared it would dull the nice ones I had on my bench at the time.