As a follow up, has roar decided that receiver packs are going to have to be hardcased too? Seems that if the issue is that you can eject the pack from the vehicle, it needs to survive on its own without some vehicle based shell around it, they should have to have that requirement as well if that is how the rules are going to go for packs that are used in vehicles. Or, then it seems you could just make a battery tray in a vehicle that seals the battery in it, basically doing the same as the receiver pack boxes on nitro vehicles.