Random modules on grid

Hi guys, I was trying to scatter pre-made modules on a grid to form a sort of growable landscape. I want to add stairs to the external faces of these modules (as opposed to having it clip in to other modules) but do not really know how, if someone could point me towards a tutorial/method or if you know of someone who has done something similar I would appreciate it, thanks!

Randomize on grid.3dm (681.5 KB)
Randomize on grid.gh (23.9 KB)

Iā€™m simply culling the stairs whose center points are inside a module (brep).

Randomize on grid_re.gh (25.9 KB)

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