I had the mammoth og with an lrp30 no problems it ran good being 11lbs even. very easy chassis layout to work on parts are easy to find well in my area. I upgraded to a traxxas revo 3.3 using the same lrp 30 and I can truly see how powerful that motor is now. The revo is all stock even plastic gears all I have is the lrp 30 and sway bars on it. I've gone through about a half gallon through it and haven't broken anything. All my trucks were only run at the track. I know the lst2 is heavier I believe but I have only seen one at the local tracks I go to. Either way it's a fun sport to get into.