You are correct, your Super Z with the HyperDrive is very similar to the 2013 model. The 2013 Hustler Super Z is a model between the X1 and your unit. We are also showing a X-One i that fits between our X-ONE and Super Duty Fastrak. Using a Parker integrated drive system. I saw photo's of the 104 on another Lawnsite thread. That thing will make a lot of tall grass short real fast. And before you guys start, it doesn't go 15mph. Hustler uses hi-torque wheel motors because of the weight. Similar drive system that is being used on our 2013 ATZ unit. More info on all the models should come out during GIE/EXPO.