I'll post some pics up later, Chrimbo shopping today[], you are right about the CEN drivetrain though, I am trying to fit a four gear diff with larger drivecups so as to allow the use of buggy shafts and to make the diffs 'bombproof'. If I can get it to work, I will be able to use the Maximizer diff casings, HPI four gear diff mod and GS spiral cut crown and bevel gears and either HPI or GS drivecups. The whole thing will be very strong and much more efficient.