How to fine tune roller (cover) position

[Stalemate]

Hello,

Is it possible to modify the firmware for all Shelly devices with "cover" (roller-shutter) function, so it would accept decimal percent for the position of the roller instead of whole integers?

So for example I will be able to make this http request:

http://192.168.1.244/roller/0?go=to_pos&roller_pos=1.2

Or is it already possible to fine tune the position which I am not aware of?