Off Topic
I got my Kit about a week ago still didn't have time to setup new years parties ect; but, it came with a spider diff and I live in California most are tracks are dusty loose dirt clay ect. I heard that the spider diffs are more for grass and racing in Europe and what not ... soo my question is what is the main difference between the Stock and Spider Differentials??? And what would be a good starting point on oil or would 10 be ok because I know it has more gears in it...

Thanks
Erik