John,
Anything that takes the wieght off of the contacts of the socket and the pins of the plug has to be good.
I've lost count of the times I've seen pictures on the Net where there is a plug in a socket that is just hanging out of the socket at some weird angle (and people wonder how fires start?).
One other thing I neglected to remember in my post above, if this is going to be installed in an outdoors location, GFCI protection probably wouldn't be a silly idea either.
