Camarillo said..
-Wing has a very loose fit on the fuselage, I would prefer to have to use
a rubber hammer , what can I do about that?
I guess the wobbles may be due (in part?) by this loose fit.
The best solution is just to make a "hotcoat" of resin on the fuselage peg: just wet it and smooth the resin with a business card. and if it is too much, just sand it after curing. If not enough, add just another layer. Solarez is a faster solution, but you will have to sand it more (hard to make a thin layer with it). Most Gong wings fit perfectly, but they can require some adjustment. Mine was a bit to tight, so I had to sand it... and then re-add some resin because I sanded too much :-)
I have not read about wobbles from other people with the XXL wing, but they may not have had the opportunity to experience stronger masts, so I do not know how a Gong foil with a well fit XXL wing would compare to a NP with a large mast in term of rigidity.