Well, the IMMORTAL is completed ...
I weighted the plane ready to fly with a 5000 mah TP Prolite X battery.
Prop is a carbon RS 21 x 14 with a Falcon 82 mm spinner
FUTABA Rx 7003 SBUS, back up Batt Hacker 500 mah
Total weight for the fuselage with batteries is 3756 g
Wings 483 g and 496 g, plus struts and hardware 66 g
So TOTAL =
4801 g
That's a very good weight leaving the possibility to use 6000 mah batt.
The weight would be 4900 g .....