Suggestion / Idea - Large retaining blocks that match the mining tiles

[patricklegault]

i am not sure if it was proposed or how to do it but it should be possible,
i am suggesting a research or an auto unlock based on existing research
ex: 1 unit - same as medium retaining wall so we have a common unit designation

ex: large retaining wall (fit in a square box like the mining designation box)
width: 2 unit ( 2 time that of the medium wall)
height: 2 unit ( 2 time that of the medium wall)
depth: 3 unit (3 times deeper than the medium wall)
cost: 8 times the medium retaining wall

ex: huge retaining wall (fit in a square box like the mining designation box but consume 4 square instead of 1)
width: 4 unit
height: 4 unit
depth: 6 unit (6 times deeper than the medium wall)
cost: 32 times the medium retaining wall cost

ex: Mega long retaining wall
Width: 16 unit
Height: 4 unit
depth: 6 unit (6 times deeper than the medium wall)
cost: 64 times the medium retaining wall cost

note: this is an example for cost and sizes but it's at your decision.
it's mostly just oversized existing building