I picked up the Xerun 120A with the built in booster. It came preinstalled with the low profile heatsink. It also came with a larger heatsink and fan.

Do I need to install the larger heatsink/fan combo if I want to run modified TC?

Do I have to open up the ESC in order to put this larger heatsink on? It looks like it came with thermal tape, although I don't know how effective that will be.