Thomas, have you thought about using the gt2 front sub chassis instead of chopping off the b4 chassis? It will allow you to mount the carbon fiber chassis flush to the front sub chassis. You can still use the b4 front tower, bulkhead, arms and stuff. You just need the gt2 sub chassis, top plate, and the steering rack, which is a by far better and more reliable, and adjustable than the b4 unit.