AZ100 12mm Altitude Axis Spacer.

The Altitude Axis spacer is to allow the use of longer dovetail bars when mounted on the left side of the mount to give clearance where the motor is fitted. The spacer is not required if using a D dovetail bar in a DV saddle on the left or any dovetail / saddle combination on the right side of the mount.
The 12mm spacer is required when using a D saddle in a D-type saddle plate on the left side of a AZ100 goto mount.
And also required is using a Vixen dovetail bar in DV-type saddle plate on the left side of a AZ100 goto mount.