If you're like me, I have tons of HSW models with numerous types of connections. I like the new multiboard (MB), but I do not like how the connections do not match that of the HSW wall except for the “peg” connection.
I worked with the MB “snap” and matched it up with the HSW wall so that you can use your HSW models with the MB wall. I added filets to the sharp edges of the HSW part so that it's easier to print and it will allow for other MB connectors to not interfere with each other.
I printed this with the MB side on the build plate OPPOSITE that is showing on the STL file. Print the way my closeup picture shows. I had no problems with the bridging with Overture PETG on an Ender 3 Neo.
For me:
There is no need for supports if your printer can handle the bridging
3 walls
%15 infill
3 top / bottom layers
The author marked this model as their own original creation.