So on the recent fancy dress ride I wore a mustache onesie. To complete this get up I whacked a mustache on my helmet in the mustache position. It made zero obstruction to my vision as it was already obscured by the nose thingy. I left it there because why not. But today I rode home in the setting sun and oh boy was it useful. Instead of riding around with my hand doing an obscene ww2 gesture I just half opened my visor and was able to block the sun with the mo. It was a little thin and I could probably have done with a more obscene ww2 style mustache but the idea is there. A bit of black tape on the bottom of your visor is your make shift sun blocker. If you can get some of that re stickable vynal you can move it to the corner of your visor when there is no sun. Now this idea seems so simple that it must have been invented by now but I can't recall ever seeing it on someone's helmet.