the planer boards, i have operate either to the left or the right....usually one board is longer than the other...i dont know what you mean bout a snubber...but i dont think they are needed....usually the clip releases the line when you have a fish on.....on like a dipsey where snubbers are needed as a shock absorber
they usually ride 'on top' of the water so to speak....they are visible to you and hopefully to other boats that are trolling....not much of an issue on lake ontario...but what an obstacle course to weave in and out when trolling round hay bay
good luck!