pic: 1726 Overdrive Chassis CAD

[clydefrog88]

My team has used a cantilevered dead axle system for the past three years with only one major issue that i can remember: bumper mounts. Last year's solution, which proved to be waaay too much trouble was to tap holes into the axles to receive the bolts from our bumpers. May I suggest that you consider integrating mount points into the frame. (I'm pretty sure you already have an adequate solution, though.)