Its always a good idea to do a heat sink
Radioshack has them, this is the ones I used
http://www.radioshack.com/product/in...ductId=2102857
I'll have the bike open this weekend and i'll take pictures of what I made, I used a project box at radioshack, put all the components in it and cut a hole in the top of the box for the heat sink
And yes you need a separate one for each, so one for each turn signal and two for the brakes. If not both turn signals would flash at the same time