Don't recalibrate smart radiator thermostats at night

I find the Tado Smart Radiator Valves are too noisy for use in bedrooms. The motor noise when opening/closing the valve is loud enough to disturb sleep. I have had to set my bedroom schedule in a way that ensures the bedroom heating will never turn on when we could be asleep, and so have to manually turn it on everytime I wake up. Not ideal.

Could you either find a way to make the existing valves quieter, maybe try slowing the motor down so it takes 30 seconds to open, rather than 1 sec? Or develop a new, quieter, radiator valve.

This is my biggest complaint with Tado, and why I struggle to reccomend it to others.

(Yes, I have been in touch with support, they were unable to improve things).