Absolutely amazing customer service. I was super stuck, pulling my hair out and frustrated. I got on a call with Una and they helped me with the installation which I had done very wrong, and helped me understand more of what I was doing very wrong.
Now that I have a bit more info, I'm sad that I missed out on stacking!
FYI, if you need a great installation video, here you go:
https://youtu.be/6AULtMgXNdI?si=iPMG11YKmTvQ7Ac_