שלום.
I would put it on the petrol engine: 3W24, Dle-30, RCG 30cc, JC30 EVO
for full 3D. Or RCG 20cc, JC23 EVO 23cc Dle 20 cc for a quiet measured aerobatics.
During this flight weight 3600-3800 gr. I believe with difficulty. Lie to the Chinese. Take-off weight will be within 5400 gr.