The manufacturers points needs to be changed to more accurately track the success of each platform.

Example:
Scenario) A race has 5 total cars and 4 are Ford and 1 is GM. If any of the 4 Fords win they get 5 points. If the 1 GM car wins then he gets 5 points. This skews the data heavily towards the platform with more participation.

New format:
Base the manufacturers points on the percentage of specific platforms in each field.
(Scenario) A race has 5 total cars and 4 are Ford and 1 is GM. If the 1 GM car wins the race he should get more manufacturer points than if any of the 4 Fords had won.

I know there is a mathmatical way of calculating the % of all platform entries but my brain can't think like that now.
Any ideas, suggestions, or criticisms will be appreciated. 8)