just finished installing the mugen tank and im very pleased with it. Its almost a direct bolt on but wasnt really any trouble putting it on at all. Seals awesome and is the stock size. And opening the lid is a lot easier then the revo tank. Now i just gotta figure out were to put my battery and reciever now. Either were the old gas tank was or were the empty spot is for the dual steering servo's. Not that big of a deal tho. Looking forward to racing now.