That may well have been the cause Dave, though the left-hand bulkhead does bow out around the motor along its entire length and the right-hand one was fubar'd anyway so I don't know if it was entirely the battery, but not great either way. The ali divider was only cheese grade anyway, would've been stronger with Cardox.

And you're right, I should know by now that if I copy something that's crap, then mine will be equally as crap