This major research project explores Downloadable Assistive Technologies (DAT) and the possibilities as well as the limitations of publishing and fabricating DAT through online 3D printing communities. A design probe was used for this research within the context of Thingiverse, in the form of a 3D printed dog wheelchair design probe – the FiGO Dog Wheelchair. FiGO enabled an exploration of issues of design and communication of DAT. Through research involving both end users as well as a health professional, as well as interactions within the FiGO project page on Thingiverse, criteria for communicating DAT published on Thingiverse were developed, and a second FiGO project page reflecting these criteria was prototyped and evaluated. It is concluded that DAT could potentially benefit most greatly from a structured set of guidelines of use and communication of risks in the form of a design brief, and that there are specific considerations to developing a meaningful design brief for DAT including: 1) Tell the story of the design, 2) Do not make assumptions about the end user, 3) Clear instruction about the design use, 4) Inclusion of source files to enable user participation and extension of the design.