Okay so here is the situation that I am in. I bought a used Cyclone Black without knowing anything about it. Apparently somewhere along the line most of the drivetrain parts where changed out with lower end parts. It doesn't have the center or front oneway. The center shaft has the plastic pullys and spur gear holder. The front of the car just had a differential in it. I really like the car and I want to get it going but I need some help. Since I'm starting from scratch as far as the drivetrain goes I want to get it right. What is the purpose of the oneway center pully when you've got a one way pully on the front diff? What parts do I need to upgrade the drivetrain. Do I need the center shaft with two pully's and a spool in the front, or should I go with the center shaft and one pully and one, oneway pully and a oneway in the front diff? If I go with a spool, which one should I get, the 3racing one, the HB 2piece, or HB one piece?