We DO NOT "override" the X-Plane mixture, but we do control it. As you stated, the mixture is usually not an issue in a turboprop, so if you are using hardware assigned to mixture, especially if it is "noisy", that would definitely be an issue that YOU will need to control at this time. The parameters that control the mixture ratio in the Saab can be found in this post. All systems, including how mixture is handled, will be addressed for Saab v2.