No problems !

Go to jaycar or DSE and buy a length of heat shrink tubing. Slide a piece cut to size over the leg (or both) that you think may short out with the bumper body etc.. Done !

As for the staples - I have a tool I found that is really strong and sharp - I lift one side of the staple and feed the light socket leg OUT.. do the reverse going back in with a tack hammer...

I use a proper hand staple gun these days - I've kinda made my own tool kit out of some strange stuff !!