Vehicle moddling with ms3d

[Quantum]

What joins are required for making vehicle?  Also, how would I know if I was modeling it the right size(two squares on the grid = player size or something like that)?

[Ad Bot]

[Packer]

hub0---hub1
|
|
|
hub2---hub3
For Wheel placement

For the "seats" it would be mount0 (Thats Driver) and then mount1 and so on for the other seats.

As for the right size, you see those grid squares in MS3D? 5 of those and 6 of them high = 1x1x1.