I admire the effort put into this project, but from following various keyboard customisation efforts which have all failed due to the depth constraint have concluded that input customisation is not something that Framework design really lends itself to. I cannot help but think the forthcoming MNT Reform Next would be a better candidate for such projects. Whilst less bulky than the traditional design, the depth of the keyboard is sufficient for mechanical switches.
It is not shown with a pointing stick but is still in the prototyping stages, so there is a possibility such a feature might be added at this stage if enough people demand it.
The Reform products are already discussed on the forum here and here.