When selecting the BTT MMB with cotton tail buffer, the '[a]_BTT_MMB_Box_Lid.stl' and '[a]_BTT_MMB_Box_Lid.stl' under 'ERCF_v2 / Recommended_Options / ERCT_Buffer / Stls / Support Arm' are a duplicate of same files under 'ERCF_v2 / STLs / Supports / BTT_MMB / Buffermount_for_ERCT', which are both assigned to be printed.
When selecting the BTT MMB with cotton tail buffer, the '[a]_BTT_MMB_Box_Lid.stl' and '[a]_BTT_MMB_Box_Lid.stl' under 'ERCF_v2 / Recommended_Options / ERCT_Buffer / Stls / Support Arm' are a duplicate of same files under 'ERCF_v2 / STLs / Supports / BTT_MMB / Buffermount_for_ERCT', which are both assigned to be printed.