Hello Sir,
I am qualified to deliver high-quality 3D models with providing you best technical solutions for your rowing machine, whilst keeping manufacturing costs low, therefore improving your profit from production. I would like to discuss in details which materials you would like to use for the machine, and which features it should have (air fan resistor or magnetic one, etc.). Please see my portfolio and contact me if you find me a competent designer.
Best regards,
Vladislav