Questions about building a West Coast Drive with VersaChassis

[Monochron]

I will be leading our team in an offseason project to build this summer to build our first (and my first) non-KOP drivetrain. I decided to base most everything on VexPro's VersaChassis as we have very little machining capabilities and to use the Toughbox Minis that came in last year's (2013) KOP.

When I started to look into what parts specifically I would need to order I realized I still had quite a few questions as to what exactly would be needed. Here are all the questions I have come up with that I need to answer before I can begin:

1. In the power trasmission, how does the pulley connect to the shaft without sliding off? Shaft collar?
2. How does the wheel connect to the shaft? Same as the pulley?
3. In the VersaChassis picture it looks like half of a VersaBlock goes on the wheel side of the tubing across from the gearbox. If this is so, how does that VersaBlock attach?
4. Where would you use the "WCP side bearing block"?
5. I am right to assume that the "WCP Gearbox Bearing Block" is used to hold the bearing on the gearbox side of the tubing for the gearbox shaft?
6. Lastly, I am currently trying to figure out how to use the "WCP How To: Belts" I was expecting to enter a tooth count for the pulley and the center-to-center distance and get back a belt length, but I guess there is more that I am missing.

Thanks in advance, any help at all is appreciated