Hi Tommy,
I've seen one A/d rafale powered by a jetcat P120 without particular reinforcement, just built as per the plan....
I think however that you should reinforce the landing gear area, by laying one coat of carbonfibre; you should also make the main landing gear mounts ( C4,5 ,8) stiffer,I used 6mm ply instead of the 3mm.
Don't be afraid by the wing attach system , it's very good, some guys just tape the wings !!!!!!!
let me know if you have any other question

)
Brg
Florent