Please try and remember that these old Hondas charging circuits aren't the best in the world, too many additions and you risk breaking down somewhere, especially if you're doing a bit of stop/start in traffic.
I've been using an H4 LED in the headlight for some time now, reduces the current draw whilst having a really good, almost identical beam pattern, it's very bright without dazzling others. Whenever I'm at a bike meet I'm constantly asked where I got the bulb from, they ain't cheap but it's lasted and even at £50 or so that's for a pair so you can do 2 bikes or even share with a mate. All my biking group now has them fitted. I'm experimenting with LED dash bulbs now for warning lights and speedo/tacho illumination, they seem to be alright as well and of course less draw so more power left for other things.