I've added a fair amount of weight to my Ecto and really loving the way it handles. Have added some weight but not a lot. Thought about trying the optional gearing for more overdrive and can't help but wonder how well these plastic gears hold up. A little unsure if running 3s brushless with added weight might be more than a plastic gear can handle over time. I'd rather do it now than have a plastic gear break when I'm out crawling.