I remixed the HSW honeycomb hollow insert to connect a honeycomb wall to my riser and also back to back for a certain setup I needed. It connects perfect to riser from Dutchworkx3d https://makerworld.com/en/models/24775#profileId-25785.
These work great with the Babo Duo riser as well. Since the Duo riser sticks out from the printer a bit, I just put a couple more of these at the bottom of the HSW panel and they sit right up against the printer like to little feet. Thanks a heap for creating them!