OK, Time for a stupid audio trick. Sometimes I have trouble gripping locking RCA connectors and other connections. I keep a wide rubberband (off of broccoli from the grocery store)stashed near my audio gear along with binding post wrenches. The rubberband gives me the grip I need without damaging the connections.
Well, I did tell you it was stupid. I also use a 12mm deep socket wrench covered with a piece of old bicycle innertube for binding posts. The binding post wrenches I purchased were all 7/16 and 1/2.
Just ask yourself, "What would McGuyver do?"