Re: making lights
That I can't help you with. I'm not a dual pull fan.
I like much more control over front and rear brakes. Those who use them seem to like them but I run discs on front and use them when I really want to slow down quickly but I avoid using them if I'm on a potentially slippery surface like sand or pea gravel. I'd rather my rear tire slide than the front one.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"