Building a 6-axis DOF robot arm for Lego World 2017, by Sioux.NET on Track - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Mindstorms H25 robot arm code / project file – blog.digidigital.de
Power HD H25 HV brushless Digital Servo RC Steering Gear with servo Arm in RC Helicopter Airplane Toys|Parts & Accessories| - AliExpress
LEGO Set 45544-1-b4 Robot Arm H25 (2021 Mindstorms > EV3) | Rebrickable - Build with LEGO