[Kcaz25]

Okay after looking further into this I have answered my own question...

I do understand that nitro truggies have a hole underneath the spur gear to get it to the starter box. This seems to be just about its only purpose. I was assured after seeing Mike's chassis. They don't have this hole so neither do I.

I will use a piece of carbon fiber that I have similar to the above picture.

Great! Problem solved. I'll post pics in a few weeks.

-Zack