So Im almost done building mine.

Weight without fuel: 16,8kg / 37 lb !!!

The heaviest ones I have seen online are 15,5kg / 34 lb
Should I be worried or just fly?

Saito FG84
ESM air retracts
Two elevator servos in tail plane (2x28g/0,98oz)
I moved the tail retract servo up front and used a long rod to connect it.