Some more VersaChassis Questions

[ksafin]

Hi everyone.

I made a thread like this with some initial questions about the VersaChassis, and with a (now) much better understanding, I come bearing some final questions before my team commits and gets ready to order the parts we need!

So, to my understanding, these are the parts one needs to make a VersaChassis:

1. 2" x 1" tubing (proper length)
2. 6 VersaBlocks
3. 1/2" hex shafts
4. 1/2" hex bearings
5. 6 Wheels, w/ accompanying 1/2" hex hubs
6. 4 belts
7. 2 15mm pulleys
8. 4 9mm pulleys
9. gussets
10. WCP gearbox
11. CAM tensioners
12. 1/2" hex spacers (useful)

Is there anything I'm missing? Something that I mentioned that isn't actually necessary?

Further, I have some small questions.
1) The VersaBlock, to my understanding, holds bearings on both sides for the shafts of the outer wheels. What in the world is the Side Bearing Block Kit (http://www.vexrobotics.com/media/cat.../file_1_11.png) and the Gearbox Bearing Block (http://www.vexrobotics.com/media/cat...ile_1_13.png)?

2) How does the WCP gearbox mount onto the square tubing? I heard something about a 1/2 VersaBlock but wasn't really sure what this meant. Do you take an actual versablock and unbolt half of it? Is there a special unit? Is that really enough to hold such a massive gearbox down?

3) CAM Tensioning. I understanding how it works and all, but have a slight inquiry. If the CAM is meant to be rotated to push against the VersaBlock to tension belts, are the bolts on the VersaBlock supposed to be loosened when this is done? Or do they stay tight so as to clamp the VersaBlock on the tubing, yet the CAM overcomes this friction and pushes the block anyway? Are the bolts on the Versablock even meant to be tightened, or are they properly tolerenced in length that the VB is just meant to slide on and be that way?

4) Similar to #2, but the gearbox has me a bit confused. The outer wheels have VersaBlocks to hold the shaft straight, what is there for the gearbox? Obviously it has its own bearing, but on the other end of the tubing where the wheel is, is there a special piece to mount onto the tubing to hold the shaft straight?

5) What in the world is this? http://www.vexrobotics.com/217-3636.html

As always, pictures are super appreciated, as I think that's the best way to understand this.

I'm sorry if I have a lot of questions, I just want to get this down to a science so that I know what to do come Jan 4th! Thanks everyone, you've been really helpful!