I know it should be possible to make it weigh 1500 grams, if it gets lighter, I would be very happy, if it gets heavier I will be disapointed [] But a bigger engine would help the situation. My F-16 will be at approx 1/11,5 scale with 122,5 cm from nose to tailpipe (125 cm overall) and 80 cm wingspan (all scale dimensions, also air intake). I am going to do everything to keep the weight down