Insert variable in open/close duration option of a Time Based Cover component

[cl-7k-01]

Hi everyone,
I ask for help from those who are more experienced than me.
In the time based cover component, in open_duration and close_duration can I insert a variable such as a number entity?

number:
  - platform: template
    name: "Open duration"
    id: open_duration
    optimistic: true
    min_value: 10000
    max_value: 60000
    step: 1000

  - platform: template
    name: "Close duration"
    id: close_duration
    optimistic: true
    min_value: 10000
    max_value: 60000
    step: 1000

cover:
  - platform: time_based
    name: "Cover 1"
    id: cover1
    open_action:
      - switch.turn_on: relay1
    open_duration: 27000ms        #Insert here variable ex. open_duration 
    close_action:
      - switch.turn_on: relay2
    close_duration: 25000ms       #Insert here variable ex. close_duration
    stop_action:
      - switch.turn_off: relay1
      - switch.turn_off: relay2

Thanks

[Ginxo]

Very good suggestion @cl-7k-01
any progress on this?