Question about Feller EDIZIOdue Smart Light Control for Philips Hue

I have installed the switch in a three-way flush-mounted combination. Read through this here https://technikblog.ch/2019....

Simply take the flush-mounted version from Hager. This works both surface-mounted and flush-mounted, everything included.
Hager pro, flush-mounted wireless pushbutton, 4-fold, white, for Philips Hue

Unfortunately, installation in an existing switch combination is not provided for. I was able to install the switch in a 6-socket combination myself with some effort (~1h) and parts from replacement sockets (also Feller). Please do not use any flammable materials for the conversion.