Vaterra shell is good quality and it fits tight to the bumper so doesn't tend to crack , 205 shell is a Delta one it looks even better in the flesh also fits tight to the bumper . We have taken our inspiration from you Mendip guys it looked so much fun we gave it a go and its awesome ! We have just started running joker laps and the result is EVEN MORE FUN !!!! we run for 5 minutes with 2 jokers first race 4 in the second and 6 in the next 2 the resulting gap fluctuation is amazing but we all end up on the same lap by the end? You have really found something here that's both fun and really competitive and relatively cheap. Hope you don't mind me posting on here but I have the feeling we wont be the only club following your lead . Cheers Andrew.