ODrive motor holder for KEDA 63-64 motor and LPD3806 encoder

Box for connecting motor and encoder, derived in spirit from https://www.thingiverse.com/thing:3167864

Features:

• Assembled exclusively using #6 sheet metal screws
• Front plate oriented such that motor wires can come out more easily
• Attempts to use the encoder's bearing to support the free end of the motor
• Back encoder support is flexible in angle (but stiff in lateral translation and torsion) to accommodate alignment of motor with encoder
• Back plate has enlarged screw holes for adjustment to be coaxial with motor
• There is a feature to potentially add a finger-shield in the future (not yet designed) because there appears to be a pinch hazard between the motor body and the box

Notes:

• The intent is to attach the motor to the larger system solely through the front plate. (Front plate would be modified to include mechanism to attach to larger system.) The box is not intended to be structural apart from holding the encoder.
• Intended for use with ODrive https://odriverobotics.com/
• One of the design goals was to make a compact system. This box is 2mm wider than the outer diameter of the motor, and the axial gap between encoder and motor is 5mm, so it's pretty compact compared to the minimum possible size.