Firstly, 11 out of Xakanxa is done by most operators, in fact I have been on board with 12+1.
MWOMP - unless you were on a safari with midgets, this weight and balance would have been over the TO limit with an hours worth of flying and the 20kg luggage restrictions most operators use - used to be 10 or 12kg.
Not such a smart move.
My comment was in agreement with Foxcotte - and making reference to being heavy - not overweight - would have made the EFATO even more challenging.