Coating with the layer of regolith cement will probably make it much harder to disassemble. Maybe blocks themselves should have attachment points which aren't u

Coating with the layer of regolith cement will probably make it much harder to disassemble. Maybe blocks themselves should have attachment points which aren't used for structure assembly, but can be used for unplanned extensions? And if necessary, those attachment points (some sort of one-time or reusable connectors) could be replaced relatively easy.