Huh? All A330MRTT host platform mission systems are provided by AiM themselves.
Back to the topic of drogues, it's not just the physical probe-to-drogue coupling which can provide problems to a designer. There are also airflow patterns, tension response and system harmonics to consider.
A system may work adequately within the heart of the envelope, but for full acceptance it must also meet the complete envelope as specified by the indicative statement of user need. If it cannot, then contract renegotiation must be considered.