The ground-out hex bit proved a great success & the T2 battery is responding well BUT, like an idiot, I forgot to strap out the fuse before connecting the 'blaster' charger! I've put in a car fuse holder in place as a 'fix' but, in the long term I'd like to put the battery back to full original spec so, has anyone got a spare legit/proper fuse link they can spare.
As an aside, to those who aren't familiar with these batteries, it's a brick shaped porcelain thing a little smaller than a LEGO brick.
Cheers, Nick