The IonOptix MEMS force probe is the next generation force sensor for our optical fiber interferometry-based force transducer designed to detect the nanoscopic forces from single isolated cardiac cells. The implementation of a high performance optical fiber reduces the size of the device, extending the experimental area while protecting the fiber. The MEMS force probe features a modular design enabling the user to replace the cantilever. This short video highlights the key steps involved in cantilever replacement.