So I created a little spread sheet to help me out. it does most of the math, and most of the final calculations. I am neither Mcmackie or Dashifen, so don't expect to much. You just plug in the numbers and it will tell you how much your vehicle costs, the AV and the final stats.
You have to calculate the design points for each piece of equipment your self. But that all you do.
For Example:
Armor costs 50 DP per level. I want 6 levels. So in the DP collum I put 300 DP. Having 6 levels of armor reduces handling so you need to slide over and put a +1 in handling.
Red numbers are negatives by the way. To input a negative number just put a - before it.
Example:
-1.15
If anyone wants to improve it or has questions about feel free to post it here. If you do want to tinker with it and repost it, that's fine, just give credit where credit is do

Shadows Rigger Vehicle Design Spreadsheet Version 1.0!