Harmonic Pin-Ring: a new drive type

Just stumbled on a new type of drive similar to cycloidal but that doesn&#39;t use disc pins at all, simplifying the design considerably: the TQ-HPR50 Harmonic Pin-Ring drive used on a Trek mountain bike. Regular cycloidal drive:In contrast, the pin-ring drive has only 4 parts, besides bearings: stator, dual-profile pin-ring disc (in red below), output disc (green), eccentric input shaft. So I had to try to reproduce that mechanism, of course. CAD to the rescue and here is the toy version: Print settings:0.4mm nozzle, 0.24 layer height3 walls, 3 top, 3 bottom25% adaptive Cubic infill Also attached are the Fusion360 CAD and STEP files. More details on patent, drive characteristics and CAD model in this post: <a target="_blank" rel="noopener noreferrer ugc" href="https://raphtro