Yes we have one as well now
[12] <&RX> [XOther] mlimit_inc GDI,5734,Blutaar Rx_Weapon_DeployedProxyC4 74 80
[12] <&RX> [C4] Mephistos placed a Proximity C4
[12] <&RX> [XOther] mlimit_inc Nod,5745,Mephistos Rx_Weapon_DeployedProxyC4 53 80
[12] <&RX> [C4] Blutaar placed a Proximity C4
[12] <&RX> [XOther] mlimit_inc GDI,5734,Blutaar Rx_Weapon_DeployedProxyC4 74 80
[12] <&RX> [C4] Mephistos placed a Proximity C4
[12] <&RX> [XOther] mlimit_inc Nod,5745,Mephistos Rx_Weapon_DeployedProxyC4 54 80
But overmining should be less of an issue with b4.