370mm X 250mm X 300mm

[curious aardvark]

why are you using such dense infill ?

If you use triagular infill and more walls/outlines you could cut the weight of the drastically and still keep them as strong.

the tringular infill is better at lateral stress than the honeycomg and also prints faster.

And again - delta - never any weight issues, no matter what you print.
Only three stepper motors to deal with. For larger machines - just use bigger steppers, never any need to double up.
One of the biggest deltas I've seen - about 10 feet by about 5 - was only using nema 23's and nothing special for belts. Looked like 6mm but was probably 10.
We were impresessed at just how basic it was.
https://3dprintboard.com/attachment....4&d=1538399634
https://3dprintboard.com/attachment....5&d=1538399716


As long as you measure accurately - even a home made delta is pretty easy to setup.