Bottom or top mounting?

I was about to mount mine and was just thinking depending on whether I mount it on top or bottom of the wingtip, I can mount it on either side right? Why do you prefer one side over the other? I was initially concerned about being located next to my dynon remote magnetometer but I called Dynon and they said they've tested it with no issues. I feel like there's more here for me to know.
 
Left or right makes no difference.
Since the VOR, localizer, or GS signals will always come from below, you may find a bit better results with the antenna on the bottom.