i can say i have had no end to problems with a wolf 3d 4.0 version,was told that it would run an au2 motor but have had it sent back to factory ,because it wasnt able to read fords pickups has had several other add ons ,apparantly the new wolf version does read the au2 motors but so far we have had several headaches with the older version,and we wont get into the service part
...but buy a haltech you could do worse...doc