Just for kicks I went to one of those web translation pages.

Manuel said;
"Hello
I bought a saab viggen 1:10 of the Jim Fox, but do not I have flat of the model Alguem can help myself about the final weight and CG ALREADY comes mounted with a rossi 90!
Obliged"

I think he needs the plan, the CG and some idea about the final weight using a rossi 90