I have this tripod model too
One thing I can point out is that the casted metal seems to be a bit to even and glossy. Do you use any displacent/normal/bump on the material or is ut just a variation of roughness? A slight variation of rougness would probably help realism especially on the glossy legs. I guess it should be presented as a new product but I also thing that some dust would also help… just a tiny hint.