Mostly final. Needs a small case around each module, and each module would be connected by connectors on the top. All cables come up to the top, nothing runs on the bottom.
There’s zero spare mms length wise. Maybe the case even won’t fit. Would need to be tested.
118mm long / 25.5mm wide per modul. Width might need to be increased so that the soldered on terminal cables would also fit
If it fits length wise (especially after the case…) it should hopefully make 20S3P a possibility by wiring up a 4S3P config of the modules. 20S1P for this board is also possible of course. Along with 2P
No way to fit a modular 4P though.