Hi Jo90...
I've been runing the TEkin RS Pro in my Durango 410 for a couple of years now, I've attached a couple of pictures to show how i have it installed...
I believe that the solder posts aslo double up as the heatsinks, so direct the cooling fan at this area will work best at keeping things cool...
I'm runing a HPI 6.5 geared 23/87 and temps are usually ok outdoors during the 'Summer months'..
Hope that helps...
JIm DiXon