Today I Drilled holes in the chassis,mounted the servo and steerring assebly,mount the diffs. I also cut out a new cleaner rear shock tower and some a-arms. I have a question about gearing. The biggest spur gear I can find that will fit is the 87t the smallest pinion is a 12t. I was wondering which pinion you guys reccomend with the stinger motor or co27 ,8-10 cells, and the mashers?