I believe you would need to change the sweep on the wing due to the significant change of weight.
I'm not sure what needs to be done to accomplish this. When the sweep is initially setup you drill through the fuselage and wing spar, which has a doubler inside. I would guess that you would leave the fuselage hole as is and redo the hole in the wing spar. Most likely you are going to have to install a new inner doubler on the spar.
It would be best to call the factory, unless someone else has already done so.