Dennis, I have a 'V' that I use for accessories. It has 4 throttles. Over time I have recorded what voltage works best for each accessory. Now knowing that I can group them into 4 divisions which is plenty. I set the throttle on the trannie and put a "do not touch" sign on it. Mostly it's just lights that I'm controlling but even there I find different voltages important. For instance, I have 40 to 50 of those Lionel street lights and many stand-alone lights that I use in structures. Being able to vary the brightness helps. You get the idea.
Since I only have a Christmas Layout, knowing how to group them each year helps make it an easier setup.
- walt
