DCM, the LiPo sack recommendation is based on energy and risk. The drive batteries have more energy in them so should anything untoward happen, they can give rise to longer and more energetic incidents. From a risk perspective, there are more dedicated chargers around for receiver and Tx batteries so the availability for users to make an incorrect setting is less.
Dodgydiy - where does it say in BRCA guidelines than an ammunition box is not allowed? If you turned up at a 12th National with one of those it would be subject to inspection prior to use, but never thrown out unilaterally.
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