Thunderbrd
C2C War Dog
With the MULTI_FEATURE_MOD it might be better to have mines as features (if we have any graphics for mines, that is).
Wouldn't the easier/better way to go about that be to make them 'invisible' (this is a whole 'nother issue on that matter) Improvements and open up the ability to have multiple overlapping, even possibly promoting, improvements on a given plot?