Copter for 3" props.

Copter for 3" props and 1104 motors.
To make it stronger use double walls and four continuous layers for bottom and top.
30% filling
no support.

Other details are used in the project:
https://ru.aliexpress.com/item/4-PCS-Red-2-5-3-inch-Propeller-Protective-Cover-Guard-Protector-for-1103-1104-1105/32823614107.html?spm=a2g0s.9042311.0.0.plMtOi

https://ru.aliexpress.com/item/4pcs-lot-DYS-BE1104-1104-Brushless-Motor-5400KV-7000KV-2-3S-For-100-120-150-Mini/32776085427.html?spm=a2g0s.9042311.0.0.plMtOi

https://ru.aliexpress.com/item/4-Pairs-3020-Motor-Blade-2-blade-Props-CW-CCW-Mini-Propeller-for-Indoor-Through-FPV/32814506554.html?spm=a2g0s.9042311.0.0.993eQE