christopi

Results 2 issues of christopi

![non_zero_weights](https://github.com/user-attachments/assets/54ec6d26-f87c-4a0d-b68f-a7d70aeca986) This error occurs when validators set weight only one miner weight. When there is only one miner, the variable `non_zero_weights` is not array, numpy.float32

regarding the X,Y, Z axis, I rendered an car object created with this model and viewed on blender but the axis is not correct ![image](https://github.com/user-attachments/assets/1a1e7b88-f81e-433e-ae3d-b783d361db15) axis should be like this...