Hi @Bug_Eyes. Can you give a bit more details about your current installation? In all honesty I’m not sure what a 5-way switch is. I did a google search and there were few hits but not sure which is your specific situation. Is the pic below what you refer to as a 5-way switch i.e., 4 switches and one light ?
Do you mean the ability to turn light on/off from 4 locations? If so, then in a classical installation you’d need 2× 3-way switches and 2× 4-way switches, as shown in the above figure. If that is the case, then the installation/wiring is very similar to that on post # 25 (and reproduced below). In principle you should be able to cascade as many smart dimmers as you’d like. However, I tried that circuit with 3 dimmers only, not more, and it worked.
If you decide to do this, I’d recommend trying this on your desk first. Of course there is no guarantee as I’m not sure what the max limit of dimmers that can be cascaded is. Notice that all boxes need to have neutrals, and you need two travelers (AC-L and YL/RD) that all dimmers must share. Do not use HOTs from different phases (from your basement) as that will not work reliably.
The other thing about the above installation (multiple dimmers on the same circuit) is that, once you pair the dimmers to your mobile App (on you phone), all dimmers will show up as a ‘single’ dimmer.