There are multiple barriers to the long term use of digital musical instruments. Among several issues related to instrument accessibility, many DMIs remain as prototypes in research labs never becoming a robust and stable instrument. Technical support is an important part of the long term use of a DMI. Though all musical instruments can eventually break, managing how they are going to be fixed and built within a research organisation can help with the continued usage of the instrument. We apply reliability analysis techniques to estimate the reliability, availability and maintainability characteristics of the T-Stick. Using these characteristics we estimate the amount of spare parts needed to maintain a 99% availability target for the T-Stick. This analysis provides insights on expected maintenance time, costs, and personnel needed when supporting and building DMIs.