If there's the remotest possibility this was a mod fault as opposed to a user fault then I disagree.
Just my personal belief .... for what its worth
Having followed all the posts by the store owner and his sales assistant
Something did not add up and they were hiding something
Stories kept chopping and changing
One minute it just blew, next as he went to open the battery door, then after the cover was removed
One minute a guy just brought it in to show them then it blew, then they handed it to him and it blew
Maybe minor discrepancies but enough to make me feel something was being hidden
It also makes me wonder that the store don't sell them .... why ....out of their choice or the distributor wont deal with them .... who knows
I will certainly bare this in mind and strip it down before use to check for any means of shorting
Keep an eye on the batteries discharging evenly periodically but it wont stop me using it unless I find a fault