It's a fair point about the stepper motors. Whilst the design looks more sturdy on the 3030 as the bed moves instead of the gantry this model which does move the gantry has NEMA23 steppers and closed loop ones too. https://www.sainsmart.com/products/proverxl-4030-v2

The ProverXL 4030 is a little more expensive, but I'd still like to get confidence it will work for me...