Adapter Reject
I got the final word from ReBirthAuto today. They are refusing to take any action to remedy the issue with the adapter and feel they have met their obligation for what was ordered. I don't know how they can see that since they did not actually make an adapter for a 1983 BMW transmission and they did not account for motor rotation of the Siemens. The lowest cost option for me now is to take the Siemens motor apart and rotate the drive face. People that I know that have taken this motor apart do not know if the water cooling will be disturbed with the rotation of the drive face. I will not know until I take the motor apart. Look for a video of that adventure. If the face rotation cannot be done without disturbing the water cooling then I will have to look at a more costly option of machining a new adapter plate. I have already been in contact with a company that does 3-D scanning. Making my own adapter from scratch may end up costing as much as buying another one from ReBirithAuto, but then I would own the design and I will know it will be done correctly.