Shelly Dimmer 2 with pair of 4 gang switches "1-0-2" for on/off and dimming

  • Hello, I am looking for a way to connect.

    Shelly Dimmer 2 with two (roller blind type) switches that has 3 positions per line: "1-0-2"

    1 - short push turn OFF/ON, long push bright down

    0 - Default state

    2 - short push turn OFF/ON, long push: bright up

    Each switch has two lines, so x2 "1-0-2" per switch.

    Desired:

    Behavior:

    - sw1 and sw2 can OFF/ON (per line)

    - sw1 and sw2 can dim/bright (per line)

    - safe in edge-case scenario (child1 hold dim at sw1 when when another child2 hold dim at sw2)

    Connection (valid?)

    - [ sw1, line1] <-> [Shelly Dimmer2, Line1] <-> [ sw2, line1]

    - [ sw1, line2] <-> [Shelly Dimmer2, Line2] <-> [ sw2, line2]

    Example mechanisms:

    - Haeger / Berker 53503404

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    - Gira 014700

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    Questions:

    - How can I connect (4 gangs for two lines) switches pair with shelly dimmer 2 and satisfy desired behavior?

    - Is a single dimmer 2 just enough for that?

    - How does the desired wiring look like?