The build instructions follow the ones in Tyler Jacques' original design. The build steps are the same as Jacques' until step 4, where the Gripper Chassis Attachment is used instead of the Intermediate Arm.
Also attached is a small part to replace a servo if it isn't needed.
The author remixed this model.
I adapted the arm attached to the gripper to connect directly to the chassis of the XRP. This allowed me to use the gripper without the additional stages.