Recently purchased a SC480X ESC for my Modified Sendero. Full light kit, skid plates, heavyweight wheels, and other weighted accessories down. This ESC is much smaller than the SC400X ESC originally equipped in the rig and it not only allowed easier, less cluttered mounting but also allows you to adjust the performance of your crawler when coupled to the Program Card. Has been working great since installation with both my 2S and 3S batteries. I am very happy with the performance and would suggest it to anyone running the Element Crawlers.