What are the basic differences between the AKD-B, AKD-C, AKD-N, AKD-T, AKD-P? For somebody fairly new to the industry like me, I would be nice to be able to explain the features, advantages, disadvantages to customers. The Kollmorgen website talks about its great features, but does not tell me what applications are appropriate for each drive. Not only will the drive be appropriately selected, but also will save the customer hundreds of dollars. If I can also get application examples that would be very helpful as well.