I am running the aluminum brake seat but the roll cage from New Era that also toughened up the chassis will not fit the slightly longer JT chassis. I think my problem was I had not set up the linkages properly and it was making the rear end move about. Perhaps CEN would consider making a roll bar similar to the New Era model in standard and extended as a hop up option? I did have a bash at it myself using steel roundbar but the weight of the thing put me off using it in the end. Looking forward to the CEN website consumerz rides page to see all the different variations of roll bar that people have come up with.