I cant be of much help as I have a 680 not the newer Bull. However, to echo grilltreats, I have the standard cart and the pit is on my deck. It gets moved around a bit, but have not had any situation where I thought the pit would tip over. I know there are folks who have retro-fitted their 680 and 700 pits with upgraded wheel assemblies to create a more stable rig with the standard legs etc.