Since everything is explained in detail and quite well already, I only want to add one thing which was wrong in here.
A power-capacitor will not make the speed-control run cooler, if any difference occurs the speedo and the motor will get slightly hotter when a capacitor is used due to the slightly higher average current.
Btw, the capacitor does "help" during the partial throttle operation of the speedo only! It basically smoothens out the battery voltage, lowers the batteries internal resistance slightly and therefore the pack should in theory stay slightly cooler!
The manual for the worlds-option-kit is available for download on our (LRP's) website.