This limitation mainly results from the balance of high performance and affordability for all three models. The heated bed needs a large amount of power supply, especially for an extremely large heated bed. If the maximum heated bed temperature of A350 is designed to be 110°C, the power module will be very big, heavy and expensive. Therefore, after evaluating the pros and cons, we decided to use a most cost efficient solution. Moreover, this design ensures a more stable performance for all three models.