As a seasoned professional in Machine Learning and Python, I believe I am the ideal candidate for your motion analysis project. I have a strong background in ML and a solid understanding of python, Matlab, Javascript, C++, and others. As evident from my extensive career in computer vision, I have developed numerous projects ranging from face recognition to image detection and emotional recognition. In fact, I've even dealt with lateral flexion in a similar project, which enhances my understanding of the complexities you might be facing.
Having a robust knowledge of data manipulation and automation, I can effectively help you with the calibration issues you mentioned, such as cross-talk between the sensors. Moreover, with my deep-learning expertise, we could create an efficient complimentary filter for your post-processing requirements.
With low price not being an issue for me when it comes to forging meaningful business relationships, I believe we can work together on this project in a way that not only guarantees desirable results but also benefits both parties comporting future initiatives. Let's embark on this journey towards technological excellence!