Last night i finished mine. Not any issues with the assemply. Neither with the diff or any other part. Just followed the instructions.
Perfect fit of the parts underlying the high quality of the kit. And i suppose since the production kit was assembled and tested by the team, if there was any faults in assemply, it should be noted. Thus if any of us had issues i believe that is due to our rushness for quich assembly and overlapping steps,just to finish quicker and enjoy this kit.